0.026110 0.000000 0.000000 0.000000 0.019120 0.000000 0.000000 0.000000 0.014771 0.00000 0.00000 0.00000 Robinson, R.C. Radziejewski, C. Stuart, D.I. Jones, E.Y. Choe, S. http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic 4 90.00 90.00 90.00 38.300 52.300 67.700 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 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 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 R C N 76 N C N 77 N O N 78 N C N 79 N S N 80 N O N 81 N H N 82 N H N 83 N H N 84 N H N 85 N H N 86 N H N 87 N H N 88 N N N 89 S C N 90 N C N 91 N O N 92 N C N 93 N C N 94 N C N 95 N O N 96 N N N 97 N O N 98 N H N 99 N H N 100 N H N 101 N H N 102 N H N 103 N H N 104 N H N 105 N H N 106 N H N 107 N H N 108 N N N 109 S C N 110 N C N 111 N O N 112 N C N 113 N C N 114 N C N 115 N O 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 H N 124 N H N 125 N H N 126 N H N 127 N N N 128 N C N 129 N C N 130 N O N 131 N O N 132 N H N 133 N H N 134 N H N 135 N H N 136 N H N 137 N N N 138 S C N 139 N C N 140 N O N 141 N C Y 142 N C Y 143 N N Y 144 N C Y 145 N C Y 146 N N N 147 N O N 148 N H N 149 N H N 150 N H N 151 N H N 152 N H N 153 N H N 154 N H N 155 N H N 156 N H N 157 N H N 158 N O N 159 N H N 160 N H N 161 N N N 162 S C N 163 N C N 164 N O N 165 S C N 166 N C N 167 N C N 168 N C N 169 N O N 170 N H N 171 N H N 172 N H N 173 N H N 174 N H N 175 N H N 176 N H N 177 N H N 178 N H N 179 N H N 180 N H N 181 N H N 182 N H N 183 N N N 184 S C N 185 N C N 186 N O N 187 N C N 188 N C N 189 N C N 190 N C N 191 N O N 192 N H N 193 N H N 194 N H N 195 N H N 196 N H N 197 N H N 198 N H N 199 N H N 200 N H N 201 N H N 202 N H N 203 N H N 204 N H N 205 N N N 206 S C N 207 N C N 208 N O N 209 N C N 210 N C N 211 N C N 212 N C N 213 N N N 214 N O N 215 N H N 216 N H N 217 N H N 218 N H N 219 N H N 220 N H N 221 N H N 222 N H N 223 N H N 224 N H N 225 N H N 226 N H N 227 N H N 228 N H N 229 N H N 230 N N N 231 S C N 232 N C N 233 N O N 234 N C Y 235 N C Y 236 N C Y 237 N C Y 238 N C Y 239 N C Y 240 N C N 241 N O 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 H N 249 N H N 250 N H N 251 N H N 252 N H N 253 N N N 254 S C N 255 N C N 256 N O N 257 N C N 258 N C N 259 N C N 260 N O N 261 N H N 262 N H N 263 N H N 264 N H N 265 N H N 266 N H N 267 N H N 268 N H N 269 N H N 270 N N N 271 S C N 272 N C N 273 N O N 274 N C N 275 N O N 276 N O N 277 N H 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 N N 285 S C N 286 N C N 287 N O N 288 R C N 289 N O N 290 N C N 291 N O N 292 N H N 293 N H N 294 N H N 295 N H N 296 N H N 297 N H N 298 N H N 299 N H N 300 N H N 301 N N N 302 S C N 303 N C N 304 N O N 305 N C Y 306 N C Y 307 N C Y 308 N C Y 309 N N Y 310 N C Y 311 N C Y 312 N C Y 313 N C Y 314 N C N 315 N O N 316 N H N 317 N H N 318 N H N 319 N H N 320 N H N 321 N H N 322 N H N 323 N H N 324 N H N 325 N H N 326 N H N 327 N H N 328 N N N 329 S C N 330 N C N 331 N O N 332 N C Y 333 N C Y 334 N C Y 335 N C Y 336 N C Y 337 N C Y 338 N C N 339 N O N 340 N O N 341 N H N 342 N H N 343 N H N 344 N H N 345 N H N 346 N H N 347 N H N 348 N H N 349 N H N 350 N H N 351 N H N 352 N N N 353 S C N 354 N C N 355 N O N 356 N C N 357 N C N 358 N C N 359 N O N 360 N H N 361 N H N 362 N H N 363 N H N 364 N H N 365 N H N 366 N H N 367 N H N 368 N H N 369 N H N 370 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 sing N 85 N sing N 86 N sing N 87 N sing N 88 N sing N 89 N doub N 90 N sing N 91 N sing N 92 N sing N 93 N sing N 94 N sing N 95 N sing N 96 N sing N 97 N doub N 98 N sing N 99 N sing N 100 N sing N 101 N sing N 102 N sing N 103 N sing N 104 N sing N 105 N sing N 106 N sing N 107 N sing N 108 N doub N 109 N sing N 110 N sing N 111 N sing N 112 N sing N 113 N sing N 114 N sing N 115 N sing N 116 N doub N 117 N sing N 118 N sing N 119 N sing N 120 N sing N 121 N sing N 122 N sing N 123 N sing N 124 N sing N 125 N sing N 126 N doub N 127 N sing N 128 N sing N 129 N sing N 130 N sing N 131 N sing N 132 N sing N 133 N sing N 134 N sing N 135 N doub N 136 N sing N 137 N sing N 138 N sing N 139 N sing Y 140 N sing Y 141 N doub Y 142 N doub N 143 N sing Y 144 N sing N 145 N sing Y 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 doub 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 sing 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 doub 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 sing N 191 N sing N 192 N sing N 193 N sing N 194 N sing N 195 N sing N 196 N sing N 197 N sing N 198 N sing N 199 N sing N 200 N doub N 201 N sing N 202 N sing N 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 sing 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 doub N 225 N sing N 226 N sing N 227 N sing N 228 N sing Y 229 N doub Y 230 N sing Y 231 N sing N 232 N sing Y 233 N doub N 234 N sing Y 235 N doub N 236 N sing Y 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 sing N 244 N sing N 245 N sing N 246 N sing N 247 N doub 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 sing N 260 N sing N 261 N sing N 262 N sing N 263 N sing N 264 N doub N 265 N sing N 266 N sing N 267 N sing N 268 N sing N 269 N sing N 270 N sing N 271 N sing N 272 N sing N 273 N sing N 274 N sing N 275 N sing N 276 N sing N 277 N doub N 278 N sing N 279 N sing N 280 N sing N 281 N sing N 282 N sing N 283 N sing 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 doub N 294 N sing N 295 N sing N 296 N sing N 297 N sing Y 298 N doub Y 299 N sing Y 300 N sing N 301 N sing Y 302 N doub Y 303 N sing Y 304 N sing N 305 N sing Y 306 N sing Y 307 N doub N 308 N sing Y 309 N doub N 310 N sing Y 311 N sing N 312 N sing N 313 N sing N 314 N sing N 315 N sing N 316 N sing N 317 N sing N 318 N sing N 319 N sing N 320 N sing N 321 N doub N 322 N sing N 323 N sing N 324 N sing N 325 N sing Y 326 N doub Y 327 N sing Y 328 N sing N 329 N sing Y 330 N doub N 331 N sing Y 332 N doub N 333 N sing Y 334 N sing N 335 N sing N 336 N sing N 337 N sing N 338 N sing N 339 N sing N 340 N sing N 341 N sing N 342 N sing N 343 N sing N 344 N sing N 345 N doub N 346 N sing N 347 N sing N 348 N sing N 349 N sing N 350 N sing N 351 N sing N 352 N sing N 353 N sing N 354 N sing N 355 N sing N 356 N sing US Protein Sci. PRCIEI 0795 0961-8368 8 2589 2597 10631974 The structures of the neurotrophin 4 homodimer and the brain-derived neurotrophic factor/neurotrophin 4 heterodimer reveal a common Trk-binding site. 1999 US Biochemistry BICHAW 0033 0006-2960 32 13350 Heterodimers of the Neurotrophic Factors: Formation, Isolation, and Differential Stability 1993 10.2210/pdb1b8k/pdb pdb_00001b8k 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 100 1 IMAGE PLATE FUJI SINGLE WAVELENGTH M x-ray 1 0.94 1.0 BL-6A Photon Factory 0.94 SYNCHROTRON PHOTON FACTORY BEAMLINE BL-6A 13649.402 PROTEIN (NEUROTROPHIN-3) 1 man polymer 18.015 water 24 nat water NT3 no no YAEHKSHRGEYSVCDSESLWVTDKSSAIDIRGHQVTVLGEIKTGNSPVKQYFYETRCKEARPVKNGCRGIDDKHWNSQCK TSQTYVRALTSENNKLVGWRWIRIDTSCVCALSRKIGRT YAEHKSHRGEYSVCDSESLWVTDKSSAIDIRGHQVTVLGEIKTGNSPVKQYFYETRCKEARPVKNGCRGIDDKHWNSQCK TSQTYVRALTSENNKLVGWRWIRIDTSCVCALSRKIGRT 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 human Homo Escherichia sample SUPPLIED BY REGENERON PHARM. 9606 Homo sapiens 562 Escherichia coli 1 2.48 50 5.6 CRYSTALLIZATION CONDITIONS: 7% ISOPROPANOL 185 MM NACITRATE PH 5.6 chem_comp_atom chem_comp_bond database_2 pdbx_initial_refinement_model repository Initial release Version format compliance Version format compliance Data collection Database references Refinement description 1 0 1999-02-09 1 1 2007-10-24 1 2 2011-07-13 1 3 2023-08-09 _database_2.pdbx_DOI _database_2.pdbx_database_accession BNL Y RCSB 1999-02-01 REL HOH water 1BNF PDB experimental model HOH 1 2 HOH HOH 120 A HOH 2 2 HOH HOH 121 A HOH 3 2 HOH HOH 122 A HOH 4 2 HOH HOH 123 A HOH 5 2 HOH HOH 124 A HOH 6 2 HOH HOH 125 A HOH 7 2 HOH HOH 126 A HOH 8 2 HOH HOH 127 A HOH 9 2 HOH HOH 128 A HOH 10 2 HOH HOH 129 A HOH 12 2 HOH HOH 130 A HOH 13 2 HOH HOH 131 A HOH 14 2 HOH HOH 132 A HOH 15 2 HOH HOH 133 A HOH 16 2 HOH HOH 134 A HOH 18 2 HOH HOH 135 A HOH 19 2 HOH HOH 136 A HOH 20 2 HOH HOH 137 A HOH 21 2 HOH HOH 138 A HOH 22 2 HOH HOH 139 A HOH 24 2 HOH HOH 140 A HOH 25 2 HOH HOH 141 A HOH 26 2 HOH HOH 142 A HOH 28 2 HOH HOH 143 A n 1 1 A n 2 2 A n 3 3 A n 4 4 A n 5 5 A n 6 6 A n 7 7 A n 8 8 A n 9 9 A n 10 10 A TYR 11 n 11 TYR 11 A SER 12 n 12 SER 12 A VAL 13 n 13 VAL 13 A CYS 14 n 14 CYS 14 A ASP 15 n 15 ASP 15 A SER 16 n 16 SER 16 A GLU 17 n 17 GLU 17 A SER 18 n 18 SER 18 A LEU 19 n 19 LEU 19 A TRP 20 n 20 TRP 20 A VAL 21 n 21 VAL 21 A THR 22 n 22 THR 22 A ASP 23 n 23 ASP 23 A LYS 24 n 24 LYS 24 A SER 25 n 25 SER 25 A SER 26 n 26 SER 26 A ALA 27 n 27 ALA 27 A ILE 28 n 28 ILE 28 A ASP 29 n 29 ASP 29 A ILE 30 n 30 ILE 30 A ARG 31 n 31 ARG 31 A GLY 32 n 32 GLY 32 A HIS 33 n 33 HIS 33 A GLN 34 n 34 GLN 34 A VAL 35 n 35 VAL 35 A THR 36 n 36 THR 36 A VAL 37 n 37 VAL 37 A LEU 38 n 38 LEU 38 A GLY 39 n 39 GLY 39 A GLU 40 n 40 GLU 40 A ILE 41 n 41 ILE 41 A n 42 42 A n 43 43 A n 44 44 A n 45 45 A n 46 46 A n 47 47 A VAL 48 n 48 VAL 48 A LYS 49 n 49 LYS 49 A GLN 50 n 50 GLN 50 A TYR 51 n 51 TYR 51 A PHE 52 n 52 PHE 52 A TYR 53 n 53 TYR 53 A GLU 54 n 54 GLU 54 A THR 55 n 55 THR 55 A ARG 56 n 56 ARG 56 A CYS 57 n 57 CYS 57 A LYS 58 n 58 LYS 58 A GLU 59 n 59 GLU 59 A n 60 60 A n 61 61 A n 62 62 A n 63 63 A n 64 64 A n 65 65 A GLY 66 n 66 GLY 66 A CYS 67 n 67 CYS 67 A ARG 68 n 68 ARG 68 A GLY 69 n 69 GLY 69 A ILE 70 n 70 ILE 70 A ASP 71 n 71 ASP 71 A ASP 72 n 72 ASP 72 A LYS 73 n 73 LYS 73 A HIS 74 n 74 HIS 74 A TRP 75 n 75 TRP 75 A ASN 76 n 76 ASN 76 A SER 77 n 77 SER 77 A GLN 78 n 78 GLN 78 A CYS 79 n 79 CYS 79 A LYS 80 n 80 LYS 80 A THR 81 n 81 THR 81 A SER 82 n 82 SER 82 A GLN 83 n 83 GLN 83 A THR 84 n 84 THR 84 A TYR 85 n 85 TYR 85 A VAL 86 n 86 VAL 86 A ARG 87 n 87 ARG 87 A ALA 88 n 88 ALA 88 A LEU 89 n 89 LEU 89 A THR 90 n 90 THR 90 A SER 91 n 91 SER 91 A GLU 92 n 92 GLU 92 A ASN 93 n 93 ASN 93 A ASN 94 n 94 ASN 94 A LYS 95 n 95 LYS 95 A LEU 96 n 96 LEU 96 A VAL 97 n 97 VAL 97 A GLY 98 n 98 GLY 98 A TRP 99 n 99 TRP 99 A ARG 100 n 100 ARG 100 A TRP 101 n 101 TRP 101 A ILE 102 n 102 ILE 102 A ARG 103 n 103 ARG 103 A ILE 104 n 104 ILE 104 A ASP 105 n 105 ASP 105 A THR 106 n 106 THR 106 A SER 107 n 107 SER 107 A CYS 108 n 108 CYS 108 A VAL 109 n 109 VAL 109 A CYS 110 n 110 CYS 110 A ALA 111 n 111 ALA 111 A LEU 112 n 112 LEU 112 A n 113 113 A n 114 114 A n 115 115 A n 116 116 A n 117 117 A n 118 118 A n 119 119 A author_defined_assembly 2 dimeric 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 -1.0000000000 0.0000000000 0.0000000000 0.0000000000 -1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 2_665 -x+1,-y+1,z crystal symmetry operation 38.3000000000 52.3000000000 0.0000000000 A O ALA 27 A O ALA 27 A N VAL 35 A N VAL 35 A O GLN 78 A O GLN 78 A N ALA 111 A N ALA 111 1 A TYR 1 A TYR 1 1 Y 1 A ALA 2 A ALA 2 1 Y 1 A GLU 3 A GLU 3 1 Y 1 A HIS 4 A HIS 4 1 Y 1 A LYS 5 A LYS 5 1 Y 1 A SER 6 A SER 6 1 Y 1 A HIS 7 A HIS 7 1 Y 1 A ARG 8 A ARG 8 1 Y 1 A GLY 9 A GLY 9 1 Y 1 A GLU 10 A GLU 10 1 Y 1 A LYS 42 A LYS 42 1 Y 1 A THR 43 A THR 43 1 Y 1 A GLY 44 A GLY 44 1 Y 1 A ASN 45 A ASN 45 1 Y 1 A SER 46 A SER 46 1 Y 1 A PRO 47 A PRO 47 1 Y 1 A ALA 60 A ALA 60 1 Y 1 A ARG 61 A ARG 61 1 Y 1 A PRO 62 A PRO 62 1 Y 1 A VAL 63 A VAL 63 1 Y 1 A LYS 64 A LYS 64 1 Y 1 A ASN 65 A ASN 65 1 Y 1 A SER 113 A SER 113 1 Y 1 A ARG 114 A ARG 114 1 Y 1 A LYS 115 A LYS 115 1 Y 1 A ILE 116 A ILE 116 1 Y 1 A GLY 117 A GLY 117 1 Y 1 A ARG 118 A ARG 118 1 Y 1 A THR 119 A THR 119 1 Y 1 A A O O SER HOH 26 142 2.10 1 A LYS 58 -99.50 -69.67 1 A ASP 72 59.72 -30.56 1 A GLU 92 -105.54 -97.64 1 A ASN 94 57.06 -170.76 1 A LYS 95 52.97 -166.71 1 A LEU 96 36.66 48.19 42.3 0.302 0.238 0.238 2.15 20 7414 5 82 RANDOM 10000000.00 0.001 1 THROUGHOUT 0.0 MOLECULAR REPLACEMENT 1BNF 2.15 20 24 750 0 0 726 0.015 2.15 2.15 20.0 1B8K 7414 0.047 1 2.0 82 data reduction DENZO data scaling SCALEPACK phasing AMoRE refinement X-PLOR Neurotrophin-3 from Human 1 N N 2 N N disulf 2.031 A CYS 14 A SG CYS 14 1_555 A CYS 79 A SG CYS 79 1_555 disulf 2.018 A CYS 57 A SG CYS 57 1_555 A CYS 108 A SG CYS 108 1_555 disulf 2.032 A CYS 67 A SG CYS 67 1_555 A CYS 110 A SG CYS 110 1_555 HORMONE/GROWTH FACTOR COMPLEX (GROWTH FACTOR-GROWTH FACTOR), NEUROTROPHIN, HORMONE-GROWTH FACTOR COMPLEX NT3_HUMAN UNP 1 P20783 139 257 1B8K 1 119 P20783 A 1 1 119 2 2 anti-parallel anti-parallel A SER 26 A SER 26 A ILE 28 A ILE 28 A GLN 34 A GLN 34 A THR 36 A THR 36 A GLN 78 A GLN 78 A THR 90 A THR 90 A GLY 98 A GLY 98 A ALA 111 A ALA 111 18 P 21 21 2