0.027793 0.000000 0.000000 0.000000 0.013263 0.000000 0.000000 0.000000 0.009251 0.00000 0.00000 0.00000 Karlsen, S. Hough, E. Olsen, R.L. http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic 4 90.00 90.00 90.00 35.980 75.400 108.100 C3 H7 N O2 89.093 y ALANINE L-peptide linking C6 H15 N4 O2 1 175.209 y ARGININE L-peptide linking C4 H8 N2 O3 132.118 y ASPARAGINE L-peptide linking C4 H7 N O4 133.103 y ASPARTIC ACID L-peptide linking C3 H7 N O2 S 121.158 y CYSTEINE L-peptide linking C5 H10 N2 O3 146.144 y GLUTAMINE L-peptide linking C5 H9 N O4 147.129 y GLUTAMIC ACID L-peptide linking C2 H5 N O2 75.067 y GLYCINE peptide linking C6 H10 N3 O2 1 156.162 y HISTIDINE L-peptide linking H2 O 18.015 WATER non-polymer C6 H13 N O2 131.173 y ISOLEUCINE L-peptide linking C6 H13 N O2 131.173 y LEUCINE L-peptide linking C6 H15 N2 O2 1 147.195 y LYSINE L-peptide linking C5 H11 N O2 S 149.211 y METHIONINE L-peptide linking C9 H11 N O2 165.189 y PHENYLALANINE L-peptide linking C5 H9 N O2 115.130 y PROLINE L-peptide linking C3 H7 N O3 105.093 y SERINE L-peptide linking C4 H9 N O3 119.119 y THREONINE L-peptide linking C11 H12 N2 O2 204.225 y TRYPTOPHAN L-peptide linking C9 H11 N O3 181.189 y TYROSINE L-peptide linking C5 H11 N O2 117.146 y VALINE L-peptide linking DK Acta Crystallogr.,Sect.D ABCRE6 0766 0907-4449 54 32 46 10.1107/S090744499700810X 9761815 Structure and proposed amino-acid sequence of a pepsin from atlantic cod (Gadus morhua). 1998 UK COMP.BIOCHEM.PHYSIOL. B: BIOCHEM.MOL.BIOL. CBPBB8 2026 0305-0491 96 323 Catalytic Properties and Chemical Composition of Pepsins from Atlantic Cod (Gadus Morhua) 1990 10.2210/pdb1am5/pdb pdb_00001am5 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 291 1 COLLIMATOR DIFFRACTOMETER 1995-10 ENRAF-NONIUS FAST GRAPHITE(002) M x-ray 1 1.5418 1.0 1.5418 BRUKER NONIUS 34033.559 PEPSIN 3.4.23.1 1 nat polymer 18.015 water 161 nat water ACID PROTEINASE no no RVTEQMKNEADTEYYGVISIGTPPESFKVIFDTGSSNLWVSSSHCSAQACSNHNKFKPRQSSTYVETGKTVDLTYGTGGM RGILGQDTVSVGGGSDPNQELGESQTEPGPFQAAAPFDGILGLAYPSIAAAGAVPVFDNMGSQSLVEKDLFSFYLSGGGA NGSEVMLGGVDNSHYTGSIHWIPVTAEKYWQVALDGITVNGQTAACEGCQAIVDTGTSKIVAPVSALANIMKDIGASENQ GEMMGNCASVQSLPDITFTINGVKQPLPPSAYIEGDQAFCTSGLGSSGVPSNTSELWIFGDVFLRNYYTIYDRTNNKVGF APAA RVTEQMKNEADTEYYGVISIGTPPESFKVIFDTGSSNLWVSSSHCSAQACSNHNKFKPRQSSTYVETGKTVDLTYGTGGM RGILGQDTVSVGGGSDPNQELGESQTEPGPFQAAAPFDGILGLAYPSIAAAGAVPVFDNMGSQSLVEKDLFSFYLSGGGA NGSEVMLGGVDNSHYTGSIHWIPVTAEKYWQVALDGITVNGQTAACEGCQAIVDTGTSKIVAPVSALANIMKDIGASENQ GEMMGNCASVQSLPDITFTINGVKQPLPPSAYIEGDQAFCTSGLGSSGVPSNTSELWIFGDVFLRNYYTIYDRTNNKVGF APAA A polypeptide(L) n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n Atlantic cod Gadus sample 8049 STOMACH Gadus morhua GASTRIC MUCOSA 1 2.15 43. 5.4 7.5 % 2-PROPANOL, 100 MM SODIUM ACETATE PH 5.4 diffrn_detector pdbx_database_status database_2 pdbx_initial_refinement_model repository Initial release Version format compliance Version format compliance Data collection Other Database references Refinement description 1 0 1997-12-24 1 1 2008-03-24 1 2 2011-07-13 1 3 2018-04-18 1 4 2023-08-02 _diffrn_detector.detector _pdbx_database_status.process_site _database_2.pdbx_DOI _database_2.pdbx_database_accession Y BNL 1997-06-23 REL REL HOH water THE AMINO ACID NUMBERING IS BASED ON THE SEQUENCE OF PEPSIN FROM PORCINE. AS RESIDUE 207 AND 241 NOT ARE PRESENT IN THE COD PEPSIN, THESE RESIDUES ARE DELETED IN THE COORDINATE FILE. 5PEP PDB ENTRY 5PEP PDB experimental model HOH 601 2 HOH HOH 601 A HOH 602 2 HOH HOH 602 A HOH 603 2 HOH HOH 603 A HOH 604 2 HOH HOH 604 A HOH 605 2 HOH HOH 605 A HOH 606 2 HOH HOH 606 A HOH 607 2 HOH HOH 607 A HOH 608 2 HOH HOH 608 A HOH 609 2 HOH HOH 609 A HOH 610 2 HOH HOH 610 A HOH 611 2 HOH HOH 611 A HOH 612 2 HOH HOH 612 A HOH 613 2 HOH HOH 613 A HOH 614 2 HOH HOH 614 A HOH 615 2 HOH HOH 615 A HOH 616 2 HOH HOH 616 A HOH 617 2 HOH HOH 617 A HOH 618 2 HOH HOH 618 A HOH 619 2 HOH HOH 619 A HOH 620 2 HOH HOH 620 A HOH 621 2 HOH HOH 621 A HOH 622 2 HOH HOH 622 A HOH 623 2 HOH HOH 623 A HOH 624 2 HOH HOH 624 A HOH 625 2 HOH HOH 625 A HOH 626 2 HOH HOH 626 A HOH 627 2 HOH HOH 627 A HOH 628 2 HOH HOH 628 A HOH 629 2 HOH HOH 629 A HOH 630 2 HOH HOH 630 A HOH 631 2 HOH HOH 631 A HOH 632 2 HOH HOH 632 A HOH 633 2 HOH HOH 633 A HOH 634 2 HOH HOH 634 A HOH 635 2 HOH HOH 635 A HOH 636 2 HOH HOH 636 A HOH 637 2 HOH HOH 637 A HOH 638 2 HOH HOH 638 A HOH 639 2 HOH HOH 639 A HOH 640 2 HOH HOH 640 A HOH 641 2 HOH HOH 641 A HOH 642 2 HOH HOH 642 A HOH 643 2 HOH HOH 643 A HOH 644 2 HOH HOH 644 A HOH 645 2 HOH HOH 645 A HOH 646 2 HOH HOH 646 A HOH 647 2 HOH HOH 647 A HOH 648 2 HOH HOH 648 A HOH 649 2 HOH HOH 649 A HOH 650 2 HOH HOH 650 A HOH 651 2 HOH HOH 651 A HOH 652 2 HOH HOH 652 A HOH 653 2 HOH HOH 653 A HOH 654 2 HOH HOH 654 A HOH 655 2 HOH HOH 655 A HOH 656 2 HOH HOH 656 A HOH 657 2 HOH HOH 657 A HOH 658 2 HOH HOH 658 A HOH 659 2 HOH HOH 659 A HOH 660 2 HOH HOH 660 A HOH 661 2 HOH HOH 661 A HOH 662 2 HOH HOH 662 A HOH 663 2 HOH HOH 663 A HOH 664 2 HOH HOH 664 A HOH 665 2 HOH HOH 665 A HOH 666 2 HOH HOH 666 A HOH 667 2 HOH HOH 667 A HOH 668 2 HOH HOH 668 A HOH 669 2 HOH HOH 669 A HOH 670 2 HOH HOH 670 A HOH 671 2 HOH HOH 671 A HOH 672 2 HOH HOH 672 A HOH 673 2 HOH HOH 673 A HOH 674 2 HOH HOH 674 A HOH 675 2 HOH HOH 675 A HOH 676 2 HOH HOH 676 A HOH 677 2 HOH HOH 677 A HOH 678 2 HOH HOH 678 A HOH 679 2 HOH HOH 679 A HOH 680 2 HOH HOH 680 A HOH 681 2 HOH HOH 681 A HOH 682 2 HOH HOH 682 A HOH 683 2 HOH HOH 683 A HOH 684 2 HOH HOH 684 A HOH 685 2 HOH HOH 685 A HOH 686 2 HOH HOH 686 A HOH 687 2 HOH HOH 687 A HOH 688 2 HOH HOH 688 A HOH 689 2 HOH HOH 689 A HOH 690 2 HOH HOH 690 A HOH 691 2 HOH HOH 691 A HOH 692 2 HOH HOH 692 A HOH 693 2 HOH HOH 693 A HOH 694 2 HOH HOH 694 A HOH 695 2 HOH HOH 695 A HOH 696 2 HOH HOH 696 A HOH 697 2 HOH HOH 697 A HOH 698 2 HOH HOH 698 A HOH 699 2 HOH HOH 699 A HOH 700 2 HOH HOH 700 A HOH 701 2 HOH HOH 701 A HOH 702 2 HOH HOH 702 A HOH 703 2 HOH HOH 703 A HOH 704 2 HOH HOH 704 A HOH 705 2 HOH HOH 705 A HOH 706 2 HOH HOH 706 A HOH 707 2 HOH HOH 707 A HOH 708 2 HOH HOH 708 A HOH 709 2 HOH HOH 709 A HOH 710 2 HOH HOH 710 A HOH 711 2 HOH HOH 711 A HOH 712 2 HOH HOH 712 A HOH 713 2 HOH HOH 713 A HOH 714 2 HOH HOH 714 A HOH 715 2 HOH HOH 715 A HOH 716 2 HOH HOH 716 A HOH 717 2 HOH HOH 717 A HOH 718 2 HOH HOH 718 A HOH 719 2 HOH HOH 719 A HOH 720 2 HOH HOH 720 A HOH 721 2 HOH HOH 721 A HOH 722 2 HOH HOH 722 A HOH 723 2 HOH HOH 723 A HOH 724 2 HOH HOH 724 A HOH 725 2 HOH HOH 725 A HOH 726 2 HOH HOH 726 A HOH 727 2 HOH HOH 727 A HOH 728 2 HOH HOH 728 A HOH 729 2 HOH HOH 729 A HOH 730 2 HOH HOH 730 A HOH 731 2 HOH HOH 731 A HOH 732 2 HOH HOH 732 A HOH 733 2 HOH HOH 733 A HOH 734 2 HOH HOH 734 A HOH 735 2 HOH HOH 735 A HOH 736 2 HOH HOH 736 A HOH 737 2 HOH HOH 737 A HOH 738 2 HOH HOH 738 A HOH 739 2 HOH HOH 739 A HOH 740 2 HOH HOH 740 A HOH 741 2 HOH HOH 741 A HOH 742 2 HOH HOH 742 A HOH 743 2 HOH HOH 743 A HOH 744 2 HOH HOH 744 A HOH 745 2 HOH HOH 745 A HOH 746 2 HOH HOH 746 A HOH 747 2 HOH HOH 747 A HOH 748 2 HOH HOH 748 A HOH 749 2 HOH HOH 749 A HOH 750 2 HOH HOH 750 A HOH 751 2 HOH HOH 751 A HOH 752 2 HOH HOH 752 A HOH 753 2 HOH HOH 753 A HOH 754 2 HOH HOH 754 A HOH 755 2 HOH HOH 755 A HOH 756 2 HOH HOH 756 A HOH 757 2 HOH HOH 757 A HOH 758 2 HOH HOH 758 A HOH 759 2 HOH HOH 759 A HOH 760 2 HOH HOH 760 A HOH 761 2 HOH HOH 761 A ARG 1 n 1 ARG 1 A VAL 2 n 2 VAL 2 A THR 3 n 3 THR 3 A GLU 4 n 4 GLU 4 A GLN 5 n 5 GLN 5 A MET 6 n 6 MET 6 A LYS 7 n 7 LYS 7 A ASN 8 n 8 ASN 8 A GLU 9 n 9 GLU 9 A ALA 10 n 10 ALA 10 A ASP 11 n 11 ASP 11 A THR 12 n 12 THR 12 A GLU 13 n 13 GLU 13 A TYR 14 n 14 TYR 14 A TYR 15 n 15 TYR 15 A GLY 16 n 16 GLY 16 A VAL 17 n 17 VAL 17 A ILE 18 n 18 ILE 18 A SER 19 n 19 SER 19 A ILE 20 n 20 ILE 20 A GLY 21 n 21 GLY 21 A THR 22 n 22 THR 22 A PRO 23 n 23 PRO 23 A PRO 24 n 24 PRO 24 A GLU 25 n 25 GLU 25 A SER 26 n 26 SER 26 A PHE 27 n 27 PHE 27 A LYS 28 n 28 LYS 28 A VAL 29 n 29 VAL 29 A ILE 30 n 30 ILE 30 A PHE 31 n 31 PHE 31 A ASP 32 n 32 ASP 32 A THR 33 n 33 THR 33 A GLY 34 n 34 GLY 34 A SER 35 n 35 SER 35 A SER 36 n 36 SER 36 A ASN 37 n 37 ASN 37 A LEU 38 n 38 LEU 38 A TRP 39 n 39 TRP 39 A VAL 40 n 40 VAL 40 A SER 41 n 41 SER 41 A SER 42 n 42 SER 42 A SER 43 n 43 SER 43 A HIS 44 n 44 HIS 44 A CYS 45 n 45 CYS 45 A SER 46 n 46 SER 46 A ALA 47 n 47 ALA 47 A GLN 48 n 48 GLN 48 A ALA 49 n 49 ALA 49 A CYS 50 n 50 CYS 50 A SER 51 n 51 SER 51 A ASN 52 n 52 ASN 52 A HIS 53 n 53 HIS 53 A ASN 54 n 54 ASN 54 A LYS 55 n 55 LYS 55 A PHE 56 n 56 PHE 56 A LYS 57 n 57 LYS 57 A PRO 58 n 58 PRO 58 A ARG 59 n 59 ARG 59 A GLN 60 n 60 GLN 60 A SER 61 n 61 SER 61 A SER 62 n 62 SER 62 A THR 63 n 63 THR 63 A TYR 64 n 64 TYR 64 A VAL 65 n 65 VAL 65 A GLU 66 n 66 GLU 66 A THR 67 n 67 THR 67 A GLY 68 n 68 GLY 68 A LYS 69 n 69 LYS 69 A THR 70 n 70 THR 70 A VAL 71 n 71 VAL 71 A ASP 72 n 72 ASP 72 A LEU 73 n 73 LEU 73 A THR 74 n 74 THR 74 A TYR 75 n 75 TYR 75 A GLY 76 n 76 GLY 76 A THR 77 n 77 THR 77 A GLY 78 n 78 GLY 78 A GLY 79 n 79 GLY 79 A MET 80 n 80 MET 80 A ARG 81 n 81 ARG 81 A GLY 82 n 82 GLY 82 A ILE 83 n 83 ILE 83 A LEU 84 n 84 LEU 84 A GLY 85 n 85 GLY 85 A GLN 86 n 86 GLN 86 A ASP 87 n 87 ASP 87 A THR 88 n 88 THR 88 A VAL 89 n 89 VAL 89 A SER 90 n 90 SER 90 A VAL 91 n 91 VAL 91 A GLY 92 n 92 GLY 92 A GLY 93 n 93 GLY 93 A GLY 94 n 94 GLY 94 A SER 95 n 95 SER 95 A ASP 96 n 96 ASP 96 A PRO 97 n 97 PRO 97 A ASN 98 n 98 ASN 98 A GLN 99 n 99 GLN 99 A GLU 100 n 100 GLU 100 A LEU 101 n 101 LEU 101 A GLY 102 n 102 GLY 102 A GLU 103 n 103 GLU 103 A SER 104 n 104 SER 104 A GLN 105 n 105 GLN 105 A THR 106 n 106 THR 106 A GLU 107 n 107 GLU 107 A PRO 108 n 108 PRO 108 A GLY 109 n 109 GLY 109 A PRO 110 n 110 PRO 110 A PHE 111 n 111 PHE 111 A GLN 112 n 112 GLN 112 A ALA 113 n 113 ALA 113 A ALA 114 n 114 ALA 114 A ALA 115 n 115 ALA 115 A PRO 116 n 116 PRO 116 A PHE 117 n 117 PHE 117 A ASP 118 n 118 ASP 118 A GLY 119 n 119 GLY 119 A ILE 120 n 120 ILE 120 A LEU 121 n 121 LEU 121 A GLY 122 n 122 GLY 122 A LEU 123 n 123 LEU 123 A ALA 124 n 124 ALA 124 A TYR 125 n 125 TYR 125 A PRO 126 n 126 PRO 126 A SER 127 n 127 SER 127 A ILE 128 n 128 ILE 128 A ALA 129 n 129 ALA 129 A ALA 130 n 130 ALA 130 A ALA 131 n 131 ALA 131 A GLY 132 n 132 GLY 132 A ALA 133 n 133 ALA 133 A VAL 134 n 134 VAL 134 A PRO 135 n 135 PRO 135 A VAL 136 n 136 VAL 136 A PHE 137 n 137 PHE 137 A ASP 138 n 138 ASP 138 A ASN 139 n 139 ASN 139 A MET 140 n 140 MET 140 A GLY 141 n 141 GLY 141 A SER 142 n 142 SER 142 A GLN 143 n 143 GLN 143 A SER 144 n 144 SER 144 A LEU 145 n 145 LEU 145 A VAL 146 n 146 VAL 146 A GLU 147 n 147 GLU 147 A LYS 148 n 148 LYS 148 A ASP 149 n 149 ASP 149 A LEU 150 n 150 LEU 150 A PHE 151 n 151 PHE 151 A SER 152 n 152 SER 152 A PHE 153 n 153 PHE 153 A TYR 154 n 154 TYR 154 A LEU 155 n 155 LEU 155 A SER 156 n 156 SER 156 A GLY 157 n 157 GLY 157 A GLY 158 n 158 GLY 158 A GLY 159 n 159 GLY 159 A ALA 160 n 160 ALA 160 A ASN 161 n 161 ASN 161 A GLY 162 n 162 GLY 162 A SER 163 n 163 SER 163 A GLU 164 n 164 GLU 164 A VAL 165 n 165 VAL 165 A MET 166 n 166 MET 166 A LEU 167 n 167 LEU 167 A GLY 168 n 168 GLY 168 A GLY 169 n 169 GLY 169 A VAL 170 n 170 VAL 170 A ASP 171 n 171 ASP 171 A ASN 172 n 172 ASN 172 A SER 173 n 173 SER 173 A HIS 174 n 174 HIS 174 A TYR 175 n 175 TYR 175 A THR 176 n 176 THR 176 A GLY 177 n 177 GLY 177 A SER 178 n 178 SER 178 A ILE 179 n 179 ILE 179 A HIS 180 n 180 HIS 180 A TRP 181 n 181 TRP 181 A ILE 182 n 182 ILE 182 A PRO 183 n 183 PRO 183 A VAL 184 n 184 VAL 184 A THR 185 n 185 THR 185 A ALA 186 n 186 ALA 186 A GLU 187 n 187 GLU 187 A LYS 188 n 188 LYS 188 A TYR 189 n 189 TYR 189 A TRP 190 n 190 TRP 190 A GLN 191 n 191 GLN 191 A VAL 192 n 192 VAL 192 A ALA 193 n 193 ALA 193 A LEU 194 n 194 LEU 194 A ASP 195 n 195 ASP 195 A GLY 196 n 196 GLY 196 A ILE 197 n 197 ILE 197 A THR 198 n 198 THR 198 A VAL 199 n 199 VAL 199 A ASN 200 n 200 ASN 200 A GLY 201 n 201 GLY 201 A GLN 202 n 202 GLN 202 A THR 203 n 203 THR 203 A ALA 204 n 204 ALA 204 A ALA 205 n 205 ALA 205 A CYS 206 n 206 CYS 206 A GLU 208 n 207 GLU 208 A GLY 209 n 208 GLY 209 A CYS 210 n 209 CYS 210 A GLN 211 n 210 GLN 211 A ALA 212 n 211 ALA 212 A ILE 213 n 212 ILE 213 A VAL 214 n 213 VAL 214 A ASP 215 n 214 ASP 215 A THR 216 n 215 THR 216 A GLY 217 n 216 GLY 217 A THR 218 n 217 THR 218 A SER 219 n 218 SER 219 A LYS 220 n 219 LYS 220 A ILE 221 n 220 ILE 221 A VAL 222 n 221 VAL 222 A ALA 223 n 222 ALA 223 A PRO 224 n 223 PRO 224 A VAL 225 n 224 VAL 225 A SER 226 n 225 SER 226 A ALA 227 n 226 ALA 227 A LEU 228 n 227 LEU 228 A ALA 229 n 228 ALA 229 A ASN 230 n 229 ASN 230 A ILE 231 n 230 ILE 231 A MET 232 n 231 MET 232 A LYS 233 n 232 LYS 233 A ASP 234 n 233 ASP 234 A ILE 235 n 234 ILE 235 A GLY 236 n 235 GLY 236 A ALA 237 n 236 ALA 237 A SER 238 n 237 SER 238 A GLU 239 n 238 GLU 239 A ASN 240 n 239 ASN 240 A GLN 242 n 240 GLN 242 A GLY 243 n 241 GLY 243 A GLU 244 n 242 GLU 244 A MET 245 n 243 MET 245 A MET 246 n 244 MET 246 A GLY 247 n 245 GLY 247 A ASN 248 n 246 ASN 248 A CYS 249 n 247 CYS 249 A ALA 250 n 248 ALA 250 A SER 251 n 249 SER 251 A VAL 252 n 250 VAL 252 A GLN 253 n 251 GLN 253 A SER 254 n 252 SER 254 A LEU 255 n 253 LEU 255 A PRO 256 n 254 PRO 256 A ASP 257 n 255 ASP 257 A ILE 258 n 256 ILE 258 A THR 259 n 257 THR 259 A PHE 260 n 258 PHE 260 A THR 261 n 259 THR 261 A ILE 262 n 260 ILE 262 A ASN 263 n 261 ASN 263 A GLY 264 n 262 GLY 264 A VAL 265 n 263 VAL 265 A LYS 266 n 264 LYS 266 A GLN 267 n 265 GLN 267 A PRO 268 n 266 PRO 268 A LEU 269 n 267 LEU 269 A PRO 270 n 268 PRO 270 A PRO 271 n 269 PRO 271 A SER 272 n 270 SER 272 A ALA 273 n 271 ALA 273 A TYR 274 n 272 TYR 274 A ILE 275 n 273 ILE 275 A GLU 276 n 274 GLU 276 A GLY 277 n 275 GLY 277 A ASP 278 n 276 ASP 278 A GLN 279 n 277 GLN 279 A ALA 280 n 278 ALA 280 A PHE 281 n 279 PHE 281 A CYS 282 n 280 CYS 282 A THR 283 n 281 THR 283 A SER 284 n 282 SER 284 A GLY 285 n 283 GLY 285 A LEU 286 n 284 LEU 286 A GLY 287 n 285 GLY 287 A SER 288 n 286 SER 288 A SER 289 n 287 SER 289 A GLY 290 n 288 GLY 290 A VAL 291 n 289 VAL 291 A PRO 292 n 290 PRO 292 A SER 293 n 291 SER 293 A ASN 294 n 292 ASN 294 A THR 295 n 293 THR 295 A SER 296 n 294 SER 296 A GLU 297 n 295 GLU 297 A LEU 298 n 296 LEU 298 A TRP 299 n 297 TRP 299 A ILE 300 n 298 ILE 300 A PHE 301 n 299 PHE 301 A GLY 302 n 300 GLY 302 A ASP 303 n 301 ASP 303 A VAL 304 n 302 VAL 304 A PHE 305 n 303 PHE 305 A LEU 306 n 304 LEU 306 A ARG 307 n 305 ARG 307 A ASN 308 n 306 ASN 308 A TYR 309 n 307 TYR 309 A TYR 310 n 308 TYR 310 A THR 311 n 309 THR 311 A ILE 312 n 310 ILE 312 A TYR 313 n 311 TYR 313 A ASP 314 n 312 ASP 314 A ARG 315 n 313 ARG 315 A THR 316 n 314 THR 316 A ASN 317 n 315 ASN 317 A ASN 318 n 316 ASN 318 A LYS 319 n 317 LYS 319 A VAL 320 n 318 VAL 320 A GLY 321 n 319 GLY 321 A PHE 322 n 320 PHE 322 A ALA 323 n 321 ALA 323 A PRO 324 n 322 PRO 324 A ALA 325 n 323 ALA 325 A ALA 326 n 324 ALA 326 A author_defined_assembly 1 monomeric 1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 1_555 x,y,z identity operation 0.0000000000 0.0000000000 0.0000000000 A O VAL 2 A O VAL 2 A N LEU 167 A N LEU 167 A O GLU 164 A O GLU 164 A N TYR 154 A N TYR 154 A O PHE 151 A O PHE 151 A N TYR 313 A N TYR 311 A O TYR 310 A O TYR 308 A N ALA 323 A N ALA 321 A O VAL 320 A O VAL 318 A N ILE 182 A N ILE 182 A O LYS 7 A O LYS 7 A N TYR 15 A N TYR 15 A O GLY 16 A O GLY 16 A N VAL 29 A N VAL 29 A O ILE 30 A O ILE 30 A N GLY 119 A N GLY 119 A O ILE 120 A O ILE 120 A N TRP 39 A N TRP 39 A O VAL 71 A O VAL 71 A N GLY 82 A N GLY 82 A O ARG 81 A O ARG 81 A N THR 106 A N THR 106 A O VAL 192 A O VAL 192 A N ALA 212 A N ALA 211 A O GLN 211 A O GLN 210 A N TRP 299 A N TRP 297 A O GLY 196 A O GLY 196 A N THR 261 A N THR 259 A O ILE 258 A O ILE 256 A N LEU 269 A N LEU 267 A O ILE 221 A O ILE 220 A N GLY 287 A N GLY 285 A O GLU 276 A O GLU 274 A N THR 283 A N THR 281 1 A A THR GLY 77 78 121.38 1 A A C N CYS GLU 206 208 3.44 1 A A C N ASN GLN 240 242 3.85 1 -9.22 0.50 120.30 111.08 A A A NE CZ NH1 ARG ARG ARG 1 1 1 N 1 5.36 0.50 120.30 125.66 A A A NE CZ NH2 ARG ARG ARG 1 1 1 N 1 -16.40 2.10 120.10 103.70 A A A CA C O ARG ARG ARG 1 1 1 N 1 18.42 2.20 117.20 135.62 A A A CA C N ARG ARG VAL 1 1 2 Y 1 -8.68 1.40 110.10 101.42 A A A N CA CB ALA ALA ALA 10 10 10 N 1 9.70 0.90 118.30 128.00 A A A CB CG OD1 ASP ASP ASP 11 11 11 N 1 12.10 1.60 122.70 134.80 A A A O C N GLU GLU TYR 13 13 14 Y 1 -12.90 1.90 110.10 97.20 A A A CB CA C SER SER SER 19 19 19 N 1 -11.48 1.40 111.50 100.02 A A A CA N CD PRO PRO PRO 23 23 23 N 1 6.85 1.10 102.60 109.45 A A A N CA CB PRO PRO PRO 23 23 23 N 1 7.49 0.90 118.30 125.79 A A A CB CG OD2 ASP ASP ASP 32 32 32 N 1 -12.70 2.10 120.10 107.40 A A A CA C O SER SER SER 36 36 36 N 1 9.13 1.50 110.50 119.63 A A A N CA CB SER SER SER 42 42 42 N 1 -20.90 1.90 110.10 89.20 A A A CB CA C SER SER SER 51 51 51 N 1 -10.29 1.70 113.60 103.31 A A A CA CB CG HIS HIS HIS 53 53 53 N 1 5.14 0.70 109.00 114.14 A A A CE1 NE2 CD2 HIS HIS HIS 53 53 53 N 1 19.28 2.20 113.40 132.68 A A A CA CB CG LYS LYS LYS 55 55 55 N 1 13.03 2.10 120.10 133.13 A A A CA C O LYS LYS LYS 55 55 55 N 1 -12.72 2.00 110.40 97.68 A A A CB CA C ARG ARG ARG 59 59 59 N 1 24.03 1.40 123.60 147.63 A A A CD NE CZ ARG ARG ARG 59 59 59 N 1 8.00 0.50 120.30 128.30 A A A NE CZ NH1 ARG ARG ARG 59 59 59 N 1 -3.66 0.50 120.30 116.64 A A A NE CZ NH2 ARG ARG ARG 59 59 59 N 1 20.53 2.50 121.70 142.23 A A A C N CA GLU THR THR 66 67 67 Y 1 16.61 1.90 110.30 126.91 A A A N CA CB THR THR THR 67 67 67 N 1 21.55 1.80 110.60 132.15 A A A N CA CB ASP ASP ASP 72 72 72 N 1 14.44 1.90 110.20 124.64 A A A CB CA C LEU LEU LEU 73 73 73 N 1 14.51 2.10 120.10 134.61 A A A CA C O LEU LEU LEU 73 73 73 N 1 -15.00 2.20 117.20 102.20 A A A CA C N LEU LEU THR 73 73 74 Y 1 -17.61 2.70 111.00 93.39 A A A N CA C THR THR THR 74 74 74 N 1 -3.86 0.60 121.00 117.14 A A A CB CG CD1 TYR TYR TYR 75 75 75 N 1 -19.92 2.50 113.10 93.18 A A A N CA C GLY GLY GLY 76 76 76 N 1 22.10 2.10 120.10 142.20 A A A CA C O THR THR THR 77 77 77 N 1 -17.35 1.70 123.20 105.85 A A A O C N THR THR GLY 77 77 78 Y 1 42.85 2.10 122.30 165.15 A A A C N CA THR GLY GLY 77 78 78 Y 1 -24.28 2.50 113.10 88.82 A A A N CA C GLY GLY GLY 78 78 78 N 1 12.03 1.70 113.30 125.33 A A A CA CB CG MET MET MET 80 80 80 N 1 49.32 1.40 123.60 172.92 A A A CD NE CZ ARG ARG ARG 81 81 81 N 1 8.50 1.10 119.40 127.90 A A A NH1 CZ NH2 ARG ARG ARG 81 81 81 N 1 -6.12 0.50 120.30 114.18 A A A NE CZ NH1 ARG ARG ARG 81 81 81 N 1 15.79 2.10 122.30 138.09 A A A C N CA GLY GLY GLY 93 94 94 Y 1 19.12 2.50 113.10 132.22 A A A N CA C GLY GLY GLY 94 94 94 N 1 -18.93 1.50 110.50 91.57 A A A N CA CB SER SER SER 95 95 95 N 1 35.31 2.70 111.00 146.31 A A A N CA C SER SER SER 95 95 95 N 1 -13.46 2.10 120.10 106.64 A A A CA C O SER SER SER 95 95 95 N 1 22.55 2.20 117.20 139.75 A A A CA C N SER SER ASP 95 95 96 Y 1 -15.76 2.00 110.40 94.64 A A A CB CA C ASP ASP ASP 96 96 96 N 1 18.59 1.90 123.30 141.89 A A A OD1 CG OD2 ASP ASP ASP 96 96 96 N 1 -12.79 0.90 118.30 105.51 A A A CB CG OD1 ASP ASP ASP 96 96 96 N 1 -5.70 0.90 118.30 112.60 A A A CB CG OD2 ASP ASP ASP 96 96 96 N 1 -14.92 2.30 121.90 106.98 A A A OD1 CG ND2 ASN ASN ASN 98 98 98 N 1 17.75 2.50 121.70 139.45 A A A C N CA PRO PHE PHE 110 111 111 Y 1 -13.42 2.10 120.10 106.68 A A A CA C O PHE PHE PHE 111 111 111 N 1 15.62 2.20 117.20 132.82 A A A CA C N PHE PHE GLN 111 111 112 Y 1 -12.24 1.60 122.70 110.46 A A A O C N GLN GLN ALA 112 112 113 Y 1 -5.76 0.90 118.30 112.54 A A A CB CG OD2 ASP ASP ASP 118 118 118 N 1 9.03 1.40 110.10 119.13 A A A N CA CB ALA ALA ALA 124 124 124 N 1 9.36 1.50 119.30 128.66 A A A C N CA TYR PRO PRO 125 126 126 Y 1 10.64 1.50 110.10 120.74 A A A CB CA C ALA ALA ALA 130 130 130 N 1 -5.99 0.90 118.30 112.31 A A A CB CG OD1 ASP ASP ASP 138 138 138 N 1 9.08 0.90 118.30 127.38 A A A CB CG OD2 ASP ASP ASP 138 138 138 N 1 14.88 2.10 122.30 137.18 A A A C N CA MET GLY GLY 140 141 141 Y 1 -17.83 1.60 110.90 93.07 A A A CG1 CB CG2 VAL VAL VAL 146 146 146 N 1 18.05 1.50 110.90 128.95 A A A CA CB CG2 VAL VAL VAL 146 146 146 N 1 15.28 2.50 121.70 136.98 A A A C N CA VAL GLU GLU 146 147 147 Y 1 13.87 2.20 113.40 127.27 A A A CA CB CG LYS LYS LYS 148 148 148 N 1 21.38 2.60 111.60 132.98 A A A CB CG CD LYS LYS LYS 148 148 148 N 1 -13.77 1.90 123.30 109.53 A A A OD1 CG OD2 ASP ASP ASP 149 149 149 N 1 8.47 0.90 118.30 126.77 A A A CB CG OD1 ASP ASP ASP 149 149 149 N 1 -21.45 1.90 110.20 88.75 A A A CB CA C LEU LEU LEU 150 150 150 N 1 20.00 2.30 115.30 135.30 A A A CA CB CG LEU LEU LEU 150 150 150 N 1 -5.25 0.60 121.00 115.75 A A A CB CG CD2 TYR TYR TYR 154 154 154 N 1 4.26 0.60 121.00 125.26 A A A CB CG CD1 TYR TYR TYR 154 154 154 N 1 -11.14 1.80 110.60 99.46 A A A N CA CB GLU GLU GLU 164 164 164 N 1 13.88 2.20 111.50 125.38 A A A N CA CB VAL VAL VAL 165 165 165 N 1 -15.48 1.60 110.90 95.42 A A A CG1 CB CG2 VAL VAL VAL 165 165 165 N 1 9.96 1.50 110.90 120.86 A A A CA CB CG2 VAL VAL VAL 165 165 165 N 1 10.84 1.70 113.30 124.14 A A A CA CB CG MET MET MET 166 166 166 N 1 12.96 2.10 122.30 135.26 A A A C N CA GLY GLY GLY 168 169 169 Y 1 -11.48 1.60 122.70 111.22 A A A O C N GLY GLY VAL 169 169 170 Y 1 17.97 2.50 121.70 139.67 A A A C N CA GLY VAL VAL 169 170 170 Y 1 11.65 1.50 110.90 122.55 A A A CA CB CG2 VAL VAL VAL 170 170 170 N 1 5.73 0.90 118.30 124.03 A A A CB CG OD2 ASP ASP ASP 171 171 171 N 1 -20.19 1.70 113.60 93.41 A A A CA CB CG HIS HIS HIS 174 174 174 N 1 10.37 1.40 112.40 122.77 A A A CA CB CG2 THR THR THR 176 176 176 N 1 10.67 1.40 110.10 120.77 A A A N CA CB ALA ALA ALA 186 186 186 N 1 11.65 1.20 123.30 134.95 A A A OE1 CD OE2 GLU GLU GLU 187 187 187 N 1 12.81 2.10 120.10 132.91 A A A CA C O LYS LYS LYS 188 188 188 N 1 -10.05 1.60 122.70 112.65 A A A O C N LYS LYS TYR 188 188 189 Y 1 -12.50 2.00 110.40 97.90 A A A CB CA C GLN GLN GLN 191 191 191 N 1 12.49 1.90 123.30 135.79 A A A OD1 CG OD2 ASP ASP ASP 195 195 195 N 1 -8.51 0.90 118.30 109.79 A A A CB CG OD2 ASP ASP ASP 195 195 195 N 1 12.80 2.10 120.10 132.90 A A A CA C O ILE ILE ILE 197 197 197 N 1 13.21 2.20 113.40 126.61 A A A CA CB CG GLN GLN GLN 202 202 202 N 1 12.17 1.80 120.60 132.77 A A A CA C O GLY GLY GLY 209 209 209 N 1 9.92 1.20 111.50 121.42 A A A CB CA C CYS CYS CYS 210 210 210 N 1 15.98 2.60 111.60 127.58 A A A CB CG CD GLN GLN GLN 211 211 211 N 1 13.98 2.00 111.60 125.58 A A A CB CA C ILE ILE ILE 213 213 213 N 1 -17.74 1.80 110.60 92.86 A A A N CA CB LYS LYS LYS 220 220 220 N 1 18.24 2.30 110.80 129.04 A A A N CA CB ILE ILE ILE 221 221 221 N 1 -14.48 2.20 111.40 96.92 A A A CG1 CB CG2 ILE ILE ILE 221 221 221 N 1 12.98 2.00 110.90 123.88 A A A CA CB CG2 ILE ILE ILE 221 221 221 N 1 10.11 1.50 110.90 121.01 A A A CA CB CG1 VAL VAL VAL 225 225 225 N 1 -14.62 1.40 110.10 95.48 A A A N CA CB ALA ALA ALA 229 229 229 N 1 -11.26 1.60 122.70 111.44 A A A O C N LYS LYS ASP 233 233 234 Y 1 -13.44 2.20 113.40 99.96 A A A CA CB CG ASP ASP ASP 234 234 234 N 1 14.06 1.90 123.30 137.36 A A A OD1 CG OD2 ASP ASP ASP 234 234 234 N 1 -6.53 0.90 118.30 111.77 A A A CB CG OD1 ASP ASP ASP 234 234 234 N 1 -7.57 0.90 118.30 110.73 A A A CB CG OD2 ASP ASP ASP 234 234 234 N 1 18.11 2.70 111.20 129.31 A A A CA CB OG SER SER SER 238 238 238 N 1 15.35 2.20 117.20 132.55 A A A CA C N CYS CYS ALA 249 249 250 Y 1 -9.92 1.60 122.70 112.78 A A A O C N CYS CYS ALA 249 249 250 Y 1 12.03 1.40 110.10 122.13 A A A N CA CB ALA ALA ALA 250 250 250 N 1 23.40 2.50 121.70 145.10 A A A C N CA SER VAL VAL 251 252 252 Y 1 15.14 1.90 123.30 138.44 A A A OD1 CG OD2 ASP ASP ASP 257 257 257 N 1 -5.50 0.90 118.30 112.80 A A A CB CG OD1 ASP ASP ASP 257 257 257 N 1 -9.54 0.90 118.30 108.76 A A A CB CG OD2 ASP ASP ASP 257 257 257 N 1 14.04 2.00 111.60 125.64 A A A CB CA C ILE ILE ILE 258 258 258 N 1 12.84 2.00 110.90 123.74 A A A CA CB CG2 ILE ILE ILE 258 258 258 N 1 -9.86 1.60 122.70 112.84 A A A O C N ILE ILE THR 258 258 259 Y 1 13.77 1.90 110.30 124.07 A A A N CA CB THR THR THR 259 259 259 N 1 12.14 1.90 111.00 123.14 A A A CA CB CG1 ILE ILE ILE 262 262 262 N 1 19.62 2.60 111.60 131.22 A A A CB CG CD LYS LYS LYS 266 266 266 N 1 18.63 2.00 110.40 129.03 A A A CB CA C GLU GLU GLU 276 276 276 N 1 21.81 2.70 114.20 136.01 A A A CB CG CD GLU GLU GLU 276 276 276 N 1 17.52 2.10 120.10 137.62 A A A CA C O GLU GLU GLU 276 276 276 N 1 -15.70 2.50 113.10 97.40 A A A N CA C GLY GLY GLY 277 277 277 N 1 20.72 2.50 121.70 142.42 A A A C N CA ASP GLN GLN 278 279 279 Y 1 14.59 2.10 120.10 134.69 A A A CA C O GLN GLN GLN 279 279 279 N 1 -13.95 1.50 110.50 96.55 A A A N CA CB SER SER SER 288 288 288 N 1 12.35 2.00 110.40 122.75 A A A CB CA C ASN ASN ASN 294 294 294 N 1 -12.54 1.60 122.70 110.16 A A A O C N ASN ASN THR 294 294 295 Y 1 19.46 2.50 121.70 141.16 A A A C N CA ASN THR THR 294 295 295 Y 1 -10.62 1.50 110.50 99.88 A A A N CA CB SER SER SER 296 296 296 N 1 26.26 2.10 120.10 146.36 A A A CA C O GLU GLU GLU 297 297 297 N 1 -16.10 2.20 117.20 101.10 A A A CA C N GLU GLU LEU 297 297 298 Y 1 -10.17 1.60 122.70 112.53 A A A O C N GLU GLU LEU 297 297 298 Y 1 19.74 2.50 121.70 141.44 A A A C N CA GLU LEU LEU 297 298 298 Y 1 16.81 2.30 115.30 132.11 A A A CA CB CG LEU LEU LEU 298 298 298 N 1 -6.56 0.90 118.30 111.74 A A A CB CG OD1 ASP ASP ASP 303 303 303 N 1 -11.72 1.90 113.40 101.68 A A A CA CB CG TYR TYR TYR 309 309 309 N 1 -18.52 1.90 110.30 91.78 A A A N CA CB THR THR THR 311 311 311 N 1 6.90 0.60 121.00 127.90 A A A CB CG CD2 TYR TYR TYR 313 313 313 N 1 -8.24 0.90 118.30 110.06 A A A CB CG OD2 ASP ASP ASP 314 314 314 N 1 6.96 0.50 120.30 127.26 A A A NE CZ NH1 ARG ARG ARG 315 315 315 N 1 -6.04 0.50 120.30 114.26 A A A NE CZ NH2 ARG ARG ARG 315 315 315 N 1 8.92 1.40 110.10 119.02 A A A N CA CB ALA ALA ALA 323 323 323 N 1 A A NH2 O ARG HOH 1 647 1.46 1_555 4_558 1 A ASP 11 58.86 17.17 1 A SER 43 -70.89 25.54 1 A ALA 47 -62.32 -178.17 1 A THR 77 23.43 104.90 1 A PHE 111 -157.06 -32.85 1 A ALA 124 -75.58 -156.76 1 A LYS 188 -126.93 -94.57 1 A THR 203 -48.73 164.82 1 A ALA 204 -176.39 9.27 1 A ALA 205 172.16 -16.87 1 A CYS 249 -72.38 -163.27 1 A ALA 250 74.69 -25.73 1 A GLN 279 69.46 87.14 1 A ALA 280 95.12 -9.88 1 A THR 295 -142.47 -113.70 1 A GLU 297 -33.37 133.24 17.22 0.224 0.208 2.16 8.00 13315 5. RANDOM 1 3.00 MOLECULAR REPLACEMENT PDB ENTRY 5PEP 0.2 2.16 8.00 161 2556 0 0 2395 0.020 0.071 0.091 0.196 22.3 2.16 20.0 1AM5 13687 1. 0.066 1 10.8 2.7 83.7 2.16 2.28 3.5 0.221 1.4 41.4 data collection MADNES data reduction CCP4 model building X-PLOR refinement PROLSQ refinement X-PLOR data reduction MADNES data scaling CCP4 phasing X-PLOR THE CRYSTAL STRUCTURE AND PROPOSED AMINO ACID SEQUENCE OF A PEPSIN FROM ATLANTIC COD (GADUS MORHUA) 1 N N 2 N N A GLN 48 A GLN 48 HELX_P A ASN 52 A ASN 52 1 1 5 A PRO 58 A PRO 58 HELX_P A GLN 60 A GLN 60 5 2 3 A PRO 126 A PRO 126 HELX_P A ILE 128 A ILE 128 5 3 3 A ALA 130 A ALA 130 HELX_P A GLY 132 A GLY 132 5 4 3 A VAL 136 A VAL 136 HELX_P A SER 142 A SER 142 1 5 7 A ASN 172 A ASN 172 HELX_P A HIS 174 A HIS 174 5 6 3 A ALA 227 A ALA 226 HELX_P A ILE 235 A ILE 234 5 7 9 A PRO 271 A PRO 269 HELX_P A TYR 274 A TYR 272 1 8 4 A ASP 303 A ASP 301 HELX_P A ASN 308 A ASN 306 1 9 6 disulf 2.040 A CYS 45 A SG CYS 45 1_555 A CYS 50 A SG CYS 50 1_555 disulf 2.070 A CYS 206 A SG CYS 206 1_555 A CYS 210 A SG CYS 209 1_555 disulf 2.004 A CYS 249 A SG CYS 247 1_555 A CYS 282 A SG CYS 280 1_555 ASPARTYL PROTEASE ASPARTYL PROTEASE, ACID PROTEINASE, HYDROLASE A THR 22 A THR 22 1 A PRO 23 A PRO 23 -20.98 PEP2B_GADMO UNP 1 1 P56272 RVTEQMKNEADTEYYGVISIGTPPESFKVIFDTGSSNLWVSSSHCSAQACSNHNKFKPRQSSTYVETGKTVDLTYGTGGM RGILGQDTVSVGGGSDPNQELGESQTEPGPFQAAAPFDGILGLAYPSIAAAGAVPVFDNMGSQSLVEKDLFSFYLSGGGA NGSEVMLGGVDNSHYTGSIHWIPVTAEKYWQVALDGITVNGQTAACEGCQAIVDTGTSKIVAPVSALANIMKDIGASENQ GEMMGNCASVQSLPDITFTINGVKQPLPPSAYIEGDQAFCTSGLGSSGVPSNTSELWIFGDVFLRNYYTIYDRTNNKVGF APAA 1 324 1AM5 1 326 P56272 A 1 1 324 6 5 3 3 3 2 2 anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel parallel anti-parallel anti-parallel anti-parallel anti-parallel parallel anti-parallel anti-parallel parallel anti-parallel A VAL 2 A VAL 2 A MET 6 A MET 6 A SER 163 A SER 163 A LEU 167 A LEU 167 A LEU 150 A LEU 150 A TYR 154 A TYR 154 A TYR 309 A TYR 307 A ASP 314 A ASP 312 A LYS 319 A LYS 317 A PRO 324 A PRO 322 A HIS 180 A HIS 180 A PRO 183 A PRO 183 A LYS 7 A LYS 7 A GLU 9 A GLU 9 A GLU 13 A GLU 13 A ILE 20 A ILE 20 A GLU 25 A GLU 25 A ASP 32 A ASP 32 A GLY 119 A GLY 119 A GLY 122 A GLY 122 A LEU 38 A LEU 38 A VAL 40 A VAL 40 A THR 70 A THR 70 A THR 74 A THR 74 A GLY 79 A GLY 79 A ASP 87 A ASP 87 A GLN 99 A GLN 99 A THR 106 A THR 106 A GLN 191 A GLN 191 A LEU 194 A LEU 194 A CYS 210 A CYS 209 A VAL 214 A VAL 213 A LEU 298 A LEU 296 A PHE 301 A PHE 299 A GLY 196 A GLY 196 A VAL 199 A VAL 199 A ILE 258 A ILE 256 A ILE 262 A ILE 260 A VAL 265 A VAL 263 A LEU 269 A LEU 267 A ILE 221 A ILE 220 A ALA 223 A ALA 222 A LEU 286 A LEU 284 A SER 288 A SER 286 A ILE 275 A ILE 273 A GLY 277 A GLY 275 A CYS 282 A CYS 280 A SER 284 A SER 282 THE CATALYTIC ASPARTIC RESIDUES, ASP 32 AND ASP 215, ARE CONNECTED THROUGH A NETWORK OF HYDROGEN BONDS. Unknown 2 A ASP 32 A ASP 32 2 1_555 A ASP 215 A ASP 214 2 1_555 19 P 21 21 21