0.023810 0.000000 0.000000 0.000000 0.023810 0.000000 0.000000 0.000000 0.028571 0.00000 0.00000 0.00000 Dauter, Z. Lamzin, V. Betzel, C. Wilson, K.S. http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic 4 90.00 90.00 90.00 42.000 42.000 35.000 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 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 LEUCINE L-peptide linking C6 H15 N2 O2 1 147.195 y LYSINE 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 C9 H11 N O3 181.189 y TYROSINE L-peptide linking C5 H11 N O2 117.146 y VALINE L-peptide linking N 1 N N N 2 S C N 3 N C N 4 N O N 5 N C N 6 N O N 7 N H N 8 N H N 9 N H N 10 N H N 11 N H N 12 N H N 13 N H N 14 N N N 15 S C N 16 N C N 17 N O N 18 N C N 19 N C N 20 N C N 21 N N N 22 N C N 23 N N N 24 N N N 25 N O N 26 N H N 27 N H N 28 N H N 29 N H N 30 N H N 31 N H N 32 N H N 33 N H N 34 N H N 35 N H N 36 N H N 37 N H N 38 N H N 39 N H N 40 N H N 41 N N N 42 S C N 43 N C N 44 N O N 45 N C N 46 N C N 47 N O N 48 N N N 49 N O N 50 N H N 51 N H N 52 N H N 53 N H N 54 N H N 55 N H N 56 N H N 57 N H N 58 N N N 59 S C N 60 N C N 61 N O N 62 N C N 63 N C N 64 N O N 65 N O N 66 N O N 67 N H N 68 N H N 69 N H N 70 N H N 71 N H N 72 N H N 73 N H N 74 N N N 75 S C N 76 N C N 77 N O N 78 N C N 79 N C N 80 N C N 81 N O N 82 N N N 83 N O N 84 N H N 85 N H N 86 N H N 87 N H N 88 N H N 89 N H N 90 N H N 91 N H N 92 N H N 93 N H N 94 N N N 95 S C N 96 N C N 97 N O N 98 N C N 99 N C N 100 N C N 101 N O N 102 N O N 103 N O N 104 N H N 105 N H N 106 N H N 107 N H N 108 N H N 109 N H N 110 N H N 111 N H N 112 N H N 113 N N N 114 N C N 115 N C N 116 N O N 117 N O N 118 N H N 119 N H N 120 N H N 121 N H N 122 N H N 123 N N N 124 S C N 125 N C N 126 N O N 127 N C Y 128 N C Y 129 N N Y 130 N C Y 131 N C Y 132 N N N 133 N O N 134 N H N 135 N H N 136 N H N 137 N H N 138 N H N 139 N H N 140 N H N 141 N H N 142 N H N 143 N H N 144 N O N 145 N H N 146 N H N 147 N N N 148 S C N 149 N C N 150 N O N 151 N C N 152 N C N 153 N C N 154 N C N 155 N O N 156 N H N 157 N H N 158 N H N 159 N H N 160 N H N 161 N H N 162 N H N 163 N H N 164 N H N 165 N H N 166 N H N 167 N H N 168 N H N 169 N N N 170 S C N 171 N C N 172 N O N 173 N C N 174 N C N 175 N C N 176 N C N 177 N N N 178 N O N 179 N H N 180 N H N 181 N H N 182 N H N 183 N H N 184 N H N 185 N H N 186 N H N 187 N H N 188 N H N 189 N H N 190 N H N 191 N H N 192 N H N 193 N H N 194 N N N 195 S C N 196 N C N 197 N O N 198 N C Y 199 N C Y 200 N C Y 201 N C Y 202 N C Y 203 N C Y 204 N C N 205 N O N 206 N H N 207 N H N 208 N H N 209 N H N 210 N H N 211 N H N 212 N H N 213 N H N 214 N H N 215 N H N 216 N H N 217 N N N 218 S C N 219 N C N 220 N O N 221 N C N 222 N C N 223 N C N 224 N O N 225 N H N 226 N H N 227 N H N 228 N H N 229 N H N 230 N H N 231 N H N 232 N H N 233 N H N 234 N N N 235 S C N 236 N C N 237 N O N 238 N C N 239 N O N 240 N O N 241 N H N 242 N H N 243 N H N 244 N H N 245 N H N 246 N H N 247 N H N 248 N N N 249 S C N 250 N C N 251 N O N 252 R C N 253 N O N 254 N C N 255 N O N 256 N H N 257 N H N 258 N H N 259 N H N 260 N H N 261 N H N 262 N H N 263 N H N 264 N H N 265 N N N 266 S C N 267 N C N 268 N O N 269 N C Y 270 N C Y 271 N C Y 272 N C Y 273 N C Y 274 N C Y 275 N C N 276 N O N 277 N O N 278 N H N 279 N H N 280 N H N 281 N H N 282 N H N 283 N H N 284 N H N 285 N H N 286 N H N 287 N H N 288 N H N 289 N N N 290 S C N 291 N C N 292 N O N 293 N C N 294 N C N 295 N C N 296 N O N 297 N H N 298 N H N 299 N H N 300 N H N 301 N H N 302 N H N 303 N H N 304 N H N 305 N H N 306 N H N 307 N H N 1 N sing N 2 N sing N 3 N sing N 4 N sing N 5 N sing N 6 N sing N 7 N doub N 8 N sing N 9 N sing N 10 N sing N 11 N sing N 12 N sing N 13 N sing N 14 N sing N 15 N sing N 16 N sing N 17 N sing N 18 N sing N 19 N doub N 20 N sing N 21 N sing N 22 N sing N 23 N sing N 24 N sing N 25 N sing N 26 N sing N 27 N sing N 28 N sing N 29 N sing N 30 N sing N 31 N sing N 32 N sing N 33 N doub N 34 N sing N 35 N sing N 36 N sing N 37 N sing N 38 N sing N 39 N sing N 40 N sing N 41 N sing N 42 N sing N 43 N sing N 44 N sing N 45 N doub N 46 N sing N 47 N sing N 48 N sing N 49 N sing N 50 N doub N 51 N sing N 52 N sing N 53 N sing N 54 N sing N 55 N sing N 56 N sing N 57 N sing N 58 N sing N 59 N sing N 60 N sing N 61 N doub N 62 N sing N 63 N sing N 64 N sing N 65 N sing N 66 N doub N 67 N sing N 68 N sing N 69 N sing N 70 N sing N 71 N sing N 72 N sing N 73 N sing N 74 N sing N 75 N sing N 76 N doub N 77 N sing N 78 N sing N 79 N sing N 80 N sing N 81 N sing N 82 N sing N 83 N sing N 84 N doub N 85 N sing N 86 N sing N 87 N sing N 88 N sing N 89 N sing N 90 N sing N 91 N sing N 92 N sing N 93 N sing N 94 N sing N 95 N doub N 96 N sing N 97 N sing N 98 N sing N 99 N sing N 100 N sing N 101 N sing N 102 N sing N 103 N doub N 104 N sing N 105 N sing N 106 N sing N 107 N sing N 108 N sing N 109 N sing N 110 N sing N 111 N sing N 112 N sing N 113 N doub N 114 N sing N 115 N sing N 116 N sing N 117 N sing N 118 N sing N 119 N sing N 120 N sing N 121 N sing N 122 N doub N 123 N sing N 124 N sing N 125 N sing N 126 N sing Y 127 N sing Y 128 N doub Y 129 N doub N 130 N sing Y 131 N sing N 132 N sing Y 133 N sing N 134 N sing N 135 N sing N 136 N sing N 137 N sing N 138 N sing N 139 N sing N 140 N sing N 141 N sing N 142 N sing N 143 N sing N 144 N sing N 145 N doub N 146 N sing N 147 N sing N 148 N sing N 149 N sing N 150 N sing N 151 N sing N 152 N sing N 153 N sing N 154 N sing N 155 N sing N 156 N sing N 157 N sing N 158 N sing N 159 N sing N 160 N sing N 161 N sing N 162 N sing N 163 N sing N 164 N sing N 165 N sing N 166 N doub N 167 N sing N 168 N sing N 169 N sing N 170 N sing N 171 N sing N 172 N sing N 173 N sing N 174 N sing N 175 N sing N 176 N sing N 177 N sing N 178 N sing N 179 N sing N 180 N sing N 181 N sing N 182 N sing N 183 N sing N 184 N sing N 185 N sing N 186 N sing N 187 N sing N 188 N sing N 189 N sing N 190 N doub N 191 N sing N 192 N sing N 193 N sing N 194 N sing Y 195 N doub Y 196 N sing Y 197 N sing N 198 N sing Y 199 N doub N 200 N sing Y 201 N doub N 202 N sing Y 203 N sing N 204 N sing N 205 N sing N 206 N sing N 207 N sing N 208 N sing N 209 N sing N 210 N sing N 211 N sing N 212 N sing N 213 N doub N 214 N sing N 215 N sing N 216 N sing N 217 N sing N 218 N sing N 219 N sing N 220 N sing N 221 N sing N 222 N sing N 223 N sing N 224 N sing N 225 N sing N 226 N sing N 227 N sing N 228 N sing N 229 N sing N 230 N doub N 231 N sing N 232 N sing N 233 N sing N 234 N sing N 235 N sing N 236 N sing N 237 N sing N 238 N sing N 239 N sing N 240 N sing N 241 N sing N 242 N sing N 243 N doub N 244 N sing N 245 N sing N 246 N sing N 247 N sing N 248 N sing N 249 N sing N 250 N sing N 251 N sing N 252 N sing N 253 N sing N 254 N sing N 255 N sing N 256 N sing N 257 N sing N 258 N sing N 259 N doub N 260 N sing N 261 N sing N 262 N sing N 263 N sing Y 264 N doub Y 265 N sing Y 266 N sing N 267 N sing Y 268 N doub N 269 N sing Y 270 N doub N 271 N sing Y 272 N sing N 273 N sing N 274 N sing N 275 N sing N 276 N sing N 277 N sing N 278 N sing N 279 N sing N 280 N sing N 281 N sing N 282 N sing N 283 N doub N 284 N sing N 285 N sing N 286 N sing N 287 N sing N 288 N sing N 289 N sing N 290 N sing N 291 N sing N 292 N sing N 293 N sing N 294 N sing NE FEBS Lett. FEBLAL 0165 0014-5793 317 185 188 10.1016/0014-5793(93)81273-3 8425603 Structure of the proteinase inhibitor eglin c with hydrolysed reactive centre at 2.0 A resolution. 1993 10.2210/pdb1egp/pdb pdb_00001egp 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 1 x-ray 1 1.0 CLEAVED BETWEEN RESIDUES 45 AND 46 5188.748 EGLIN-C 1 nat polymer CLEAVED BETWEEN RESIDUES 45 AND 46 2928.290 EGLIN-C 1 nat polymer 18.015 water 125 nat water no no TEFGSELKSFPEVVGKTVDQAREYFTLHYPQYNVYFLPEGSPVTL TEFGSELKSFPEVVGKTVDQAREYFTLHYPQYNVYFLPEGSPVTL A polypeptide(L) no no DLRYNRVRVFYNPGTNVVNHVPHVG DLRYNRVRVFYNPGTNVVNHVPHVG B 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 medicinal leech Hirudo sample 6421 Hirudo medicinalis medicinal leech Hirudo sample 6421 Hirudo medicinalis 1.90 35.27 chem_comp_atom chem_comp_bond database_2 struct_ref_seq_dif repository Initial release Version format compliance Version format compliance Data collection Database references 1 0 1995-12-07 1 1 2008-03-24 1 2 2011-07-13 1 3 2024-02-07 _database_2.pdbx_DOI _database_2.pdbx_database_accession _struct_ref_seq_dif.details Y BNL 1995-09-01 REL REL HOH water SECONDARY STRUCTURE BOUNDARIES HAVE BEEN DETERMINED USING SS PROGRAM (V.S.LAMZIN, EMBL HAMBURG) AS DESCRIBED IN V.S.LAMZIN,Z.DAUTER,V.O.POPOV,E.H.HARUTYUNYAN,K.S.WILSON J.MOL.BIOL. (1994) V.236, 759-785. HOH 4 3 HOH HOH 46 A HOH 7 3 HOH HOH 47 A HOH 10 3 HOH HOH 48 A HOH 11 3 HOH HOH 49 A HOH 13 3 HOH HOH 50 A HOH 14 3 HOH HOH 51 A HOH 15 3 HOH HOH 52 A HOH 17 3 HOH HOH 53 A HOH 18 3 HOH HOH 54 A HOH 19 3 HOH HOH 55 A HOH 23 3 HOH HOH 56 A HOH 24 3 HOH HOH 57 A HOH 25 3 HOH HOH 58 A HOH 27 3 HOH HOH 59 A HOH 28 3 HOH HOH 60 A HOH 31 3 HOH HOH 61 A HOH 32 3 HOH HOH 62 A HOH 34 3 HOH HOH 63 A HOH 35 3 HOH HOH 64 A HOH 36 3 HOH HOH 65 A HOH 37 3 HOH HOH 66 A HOH 39 3 HOH HOH 67 A HOH 40 3 HOH HOH 68 A HOH 41 3 HOH HOH 69 A HOH 42 3 HOH HOH 70 A HOH 43 3 HOH HOH 71 A HOH 45 3 HOH HOH 72 A HOH 47 3 HOH HOH 73 A HOH 48 3 HOH HOH 74 A HOH 49 3 HOH HOH 75 A HOH 50 3 HOH HOH 76 A HOH 51 3 HOH HOH 77 A HOH 52 3 HOH HOH 78 A HOH 55 3 HOH HOH 79 A HOH 56 3 HOH HOH 80 A HOH 59 3 HOH HOH 81 A HOH 61 3 HOH HOH 82 A HOH 62 3 HOH HOH 83 A HOH 64 3 HOH HOH 84 A HOH 66 3 HOH HOH 85 A HOH 67 3 HOH HOH 86 A HOH 68 3 HOH HOH 87 A HOH 69 3 HOH HOH 88 A HOH 71 3 HOH HOH 89 A HOH 72 3 HOH HOH 90 A HOH 74 3 HOH HOH 91 A HOH 76 3 HOH HOH 92 A HOH 77 3 HOH HOH 93 A HOH 79 3 HOH HOH 94 A HOH 80 3 HOH HOH 95 A HOH 81 3 HOH HOH 96 A HOH 82 3 HOH HOH 97 A HOH 83 3 HOH HOH 98 A HOH 84 3 HOH HOH 99 A HOH 85 3 HOH HOH 100 A HOH 88 3 HOH HOH 101 A HOH 89 3 HOH HOH 102 A HOH 90 3 HOH HOH 103 A HOH 92 3 HOH HOH 104 A HOH 96 3 HOH HOH 105 A HOH 99 3 HOH HOH 106 A HOH 100 3 HOH HOH 107 A HOH 101 3 HOH HOH 108 A HOH 103 3 HOH HOH 109 A HOH 104 3 HOH HOH 110 A HOH 105 3 HOH HOH 111 A HOH 106 3 HOH HOH 112 A HOH 107 3 HOH HOH 113 A HOH 109 3 HOH HOH 114 A HOH 111 3 HOH HOH 115 A HOH 113 3 HOH HOH 116 A HOH 114 3 HOH HOH 117 A HOH 115 3 HOH HOH 118 A HOH 116 3 HOH HOH 119 A HOH 118 3 HOH HOH 120 A HOH 119 3 HOH HOH 121 A HOH 120 3 HOH HOH 122 A HOH 123 3 HOH HOH 123 A HOH 124 3 HOH HOH 124 A HOH 125 3 HOH HOH 125 A HOH 1 3 HOH HOH 71 B HOH 2 3 HOH HOH 72 B HOH 3 3 HOH HOH 73 B HOH 5 3 HOH HOH 74 B HOH 6 3 HOH HOH 75 B HOH 8 3 HOH HOH 76 B HOH 9 3 HOH HOH 77 B HOH 12 3 HOH HOH 78 B HOH 16 3 HOH HOH 79 B HOH 20 3 HOH HOH 80 B HOH 21 3 HOH HOH 81 B HOH 22 3 HOH HOH 82 B HOH 26 3 HOH HOH 83 B HOH 29 3 HOH HOH 84 B HOH 30 3 HOH HOH 85 B HOH 33 3 HOH HOH 86 B HOH 38 3 HOH HOH 87 B HOH 44 3 HOH HOH 88 B HOH 46 3 HOH HOH 89 B HOH 53 3 HOH HOH 90 B HOH 54 3 HOH HOH 91 B HOH 57 3 HOH HOH 92 B HOH 58 3 HOH HOH 93 B HOH 60 3 HOH HOH 94 B HOH 63 3 HOH HOH 95 B HOH 65 3 HOH HOH 96 B HOH 70 3 HOH HOH 97 B HOH 73 3 HOH HOH 98 B HOH 75 3 HOH HOH 99 B HOH 78 3 HOH HOH 100 B HOH 86 3 HOH HOH 101 B HOH 87 3 HOH HOH 102 B HOH 91 3 HOH HOH 103 B HOH 93 3 HOH HOH 104 B HOH 94 3 HOH HOH 105 B HOH 95 3 HOH HOH 106 B HOH 97 3 HOH HOH 107 B HOH 98 3 HOH HOH 108 B HOH 102 3 HOH HOH 109 B HOH 108 3 HOH HOH 110 B HOH 110 3 HOH HOH 111 B HOH 112 3 HOH HOH 112 B HOH 117 3 HOH HOH 113 B HOH 121 3 HOH HOH 114 B HOH 122 3 HOH HOH 115 B n 1 1 A n 2 2 A n 3 3 A n 4 4 A n 5 5 A n 6 6 A LEU 7 n 7 LEU 7 A LYS 8 n 8 LYS 8 A SER 9 n 9 SER 9 A PHE 10 n 10 PHE 10 A PRO 11 n 11 PRO 11 A GLU 12 n 12 GLU 12 A VAL 13 n 13 VAL 13 A VAL 14 n 14 VAL 14 A GLY 15 n 15 GLY 15 A LYS 16 n 16 LYS 16 A THR 17 n 17 THR 17 A VAL 18 n 18 VAL 18 A ASP 19 n 19 ASP 19 A GLN 20 n 20 GLN 20 A ALA 21 n 21 ALA 21 A ARG 22 n 22 ARG 22 A GLU 23 n 23 GLU 23 A TYR 24 n 24 TYR 24 A PHE 25 n 25 PHE 25 A THR 26 n 26 THR 26 A LEU 27 n 27 LEU 27 A HIS 28 n 28 HIS 28 A TYR 29 n 29 TYR 29 A PRO 30 n 30 PRO 30 A GLN 31 n 31 GLN 31 A TYR 32 n 32 TYR 32 A ASN 33 n 33 ASN 33 A VAL 34 n 34 VAL 34 A TYR 35 n 35 TYR 35 A PHE 36 n 36 PHE 36 A LEU 37 n 37 LEU 37 A PRO 38 n 38 PRO 38 A GLU 39 n 39 GLU 39 A GLY 40 n 40 GLY 40 A SER 41 n 41 SER 41 A PRO 42 n 42 PRO 42 A VAL 43 n 43 VAL 43 A THR 44 n 44 THR 44 A LEU 45 n 45 LEU 45 A n 1 46 B n 2 47 B n 3 48 B TYR 49 n 4 TYR 49 B ASN 50 n 5 ASN 50 B ARG 51 n 6 ARG 51 B VAL 52 n 7 VAL 52 B ARG 53 n 8 ARG 53 B VAL 54 n 9 VAL 54 B PHE 55 n 10 PHE 55 B TYR 56 n 11 TYR 56 B ASN 57 n 12 ASN 57 B PRO 58 n 13 PRO 58 B GLY 59 n 14 GLY 59 B THR 60 n 15 THR 60 B ASN 61 n 16 ASN 61 B VAL 62 n 17 VAL 62 B VAL 63 n 18 VAL 63 B ASN 64 n 19 ASN 64 B HIS 65 n 20 HIS 65 B VAL 66 n 21 VAL 66 B PRO 67 n 22 PRO 67 B HIS 68 n 23 HIS 68 B VAL 69 n 24 VAL 69 B GLY 70 n 25 GLY 70 B author_and_software_defined_assembly PISA 2 dimeric 1750 -12 4380 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 ASN 33 A O ASN 33 B N VAL 52 B N VAL 7 1 A THR 1 A THR 1 1 Y 1 A GLU 2 A GLU 2 1 Y 1 A PHE 3 A PHE 3 1 Y 1 A GLY 4 A GLY 4 1 Y 1 A SER 5 A SER 5 1 Y 1 A GLU 6 A GLU 6 1 Y 1 B ASP 46 B ASP 1 1 Y 1 B LEU 47 B LEU 2 1 Y 1 B ARG 48 B ARG 3 1 Y 1 B B O O HOH HOH 76 85 2.04 1 -13.97 0.90 118.30 104.33 A A A CB CG OD2 ASP ASP ASP 19 19 19 N 1 4.46 0.50 120.30 124.76 A A A NE CZ NH2 ARG ARG ARG 22 22 22 N 1 -4.61 0.60 121.00 116.39 A A A CB CG CD1 TYR TYR TYR 35 35 35 N 1 -13.55 2.10 120.10 106.55 A A A CA C O LEU LEU LEU 45 45 45 N 1 -5.49 0.60 121.00 115.51 B B B CB CG CD1 TYR TYR TYR 49 49 49 N 1 -3.07 0.50 120.30 117.23 B B B NE CZ NH1 ARG ARG ARG 51 51 51 N 1 3.04 0.50 120.30 123.34 B B B NE CZ NH2 ARG ARG ARG 53 53 53 N 1 -4.45 0.70 120.80 116.35 B B B CB CG CD1 PHE PHE PHE 55 55 55 N 1 15.66 2.30 121.90 137.56 B B B OD1 CG ND2 ASN ASN ASN 61 61 61 N 1 A A HG H SER LEU 9 45 1.15 1_555 2_664 1 A A OG H SER LEU 9 45 1.57 1_555 2_664 1 B B O O HOH HOH 78 84 2.05 1_555 3_654 0.1220000 2.0 10.0 4107 1 0.0 2.0 10.0 125 1115 0 0 990 0.022 0.020 0.051 0.040 0.054 0.050 2.1 2.0 2.9 3.0 5.3 4.0 7.1 5.0 0.015 0.020 0.176 0.150 0.194 0.300 0.281 0.300 0.247 0.300 2.5 3.0 14.7 15.0 13.2 20.0 model building ARP/wARP refinement PROLSQ PROTEINASE INHIBITOR EGLIN C WITH HYDROLYSED REACTIVE CENTER 1 N N 2 N N 3 N N 3 N N A PRO 11 A PRO 11 HELX_P A VAL 13 A VAL 13 5 1 3 A VAL 18 A VAL 18 HELX_P A HIS 28 A HIS 28 1 2 11 PROTEINASE INHIBITOR PROTEINASE INHIBITOR ICIC_HIRME UNP 1 1 P01051 ICIC_HIRME UNP 2 46 P01051 1 45 1EGP 1 45 P01051 A 1 1 45 46 70 1EGP 46 70 P01051 B 2 1 25 1 ASP conflict ASN 33 1EGP A P01051 UNP 33 33 2 parallel A ASN 33 A ASN 33 A PRO 38 A PRO 38 B ARG 51 B ARG 6 B TYR 56 B TYR 11 78 P 43