1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 Holaday Jr., S.K. Martin, B.M. Fletcher Jr., P.L. Krishna, N.R. http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic 1 90.00 90.00 90.00 1.000 1.000 1.000 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 C3 H7 N O2 S 121.158 y CYSTEINE 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 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 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 O 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 N N 108 N C N 109 N C N 110 N O N 111 N O N 112 N H N 113 N H N 114 N H N 115 N H N 116 N H N 117 N N N 118 S C N 119 N C N 120 N O N 121 N C Y 122 N C Y 123 N N Y 124 N C Y 125 N C Y 126 N N N 127 N O N 128 N H N 129 N H N 130 N H N 131 N H N 132 N H N 133 N H N 134 N H N 135 N H N 136 N H N 137 N H N 138 N N N 139 S C N 140 N C N 141 N O N 142 N C N 143 N C N 144 N C N 145 N C N 146 N O N 147 N H 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 H N 159 N H N 160 N N N 161 S C N 162 N C N 163 N O N 164 N C N 165 N C N 166 N C N 167 N C N 168 N N 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 H N 184 N H N 185 N N N 186 S C N 187 N C N 188 N O N 189 N C N 190 N C N 191 N S N 192 N C N 193 N O 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 Y 210 N C Y 211 N C Y 212 N C Y 213 N C Y 214 N C Y 215 N C N 216 N O 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 N N 229 S C N 230 N C N 231 N O N 232 N C N 233 N C N 234 N C N 235 N O N 236 N H N 237 N H N 238 N H N 239 N H N 240 N H N 241 N H N 242 N H N 243 N H N 244 N H N 245 N N N 246 S C N 247 N C N 248 N O N 249 N C N 250 N O N 251 N O N 252 N H N 253 N H N 254 N H N 255 N H N 256 N H N 257 N H N 258 N H N 259 N N N 260 S C N 261 N C N 262 N O N 263 R C N 264 N O N 265 N C N 266 N O N 267 N H N 268 N H N 269 N H N 270 N H N 271 N H N 272 N H N 273 N H N 274 N H N 275 N H N 276 N N N 277 S C N 278 N C N 279 N O N 280 N C Y 281 N C Y 282 N C Y 283 N C Y 284 N N Y 285 N C Y 286 N C Y 287 N C Y 288 N C Y 289 N C N 290 N O N 291 N H 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 H N 302 N H N 303 N N N 304 S C N 305 N C N 306 N O N 307 N C Y 308 N C Y 309 N C Y 310 N C Y 311 N C Y 312 N C Y 313 N C N 314 N O 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 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 doub N 108 N sing 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 Y 121 N sing Y 122 N doub Y 123 N doub N 124 N sing Y 125 N sing N 126 N sing Y 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 sing N 136 N sing N 137 N doub 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 sing 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 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 sing N 180 N sing N 181 N sing N 182 N doub 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 sing N 201 N doub N 202 N sing N 203 N sing N 204 N sing N 205 N sing Y 206 N doub Y 207 N sing Y 208 N sing N 209 N sing Y 210 N doub N 211 N sing Y 212 N doub N 213 N sing Y 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 N 229 N sing N 230 N sing 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 doub N 242 N sing N 243 N sing 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 doub 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 sing N 265 N sing N 266 N sing N 267 N sing N 268 N sing N 269 N sing N 270 N doub N 271 N sing N 272 N sing N 273 N sing N 274 N sing Y 275 N doub Y 276 N sing Y 277 N sing N 278 N sing Y 279 N doub Y 280 N sing Y 281 N sing N 282 N sing Y 283 N sing Y 284 N doub N 285 N sing Y 286 N doub N 287 N sing Y 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 N 295 N sing N 296 N sing N 297 N sing N 298 N doub N 299 N sing N 300 N sing N 301 N sing N 302 N sing Y 303 N doub Y 304 N sing Y 305 N sing N 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 US Arch.Biochem.Biophys. ABBIA4 0158 0003-9861 379 18 27 10.1006/abbi.2000.1858 10864437 NMR solution structure of butantoxin. 2000 10.2210/pdb1c55/pdb pdb_00001c55 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 4521.282 BUTANTOXIN 1 nat polymer no no WCSTCLDLACGASRECYDPCFKAFGRAHGKCMNNKCRCYT WCSTCLDLACGASRECYDPCFKAFGRAHGKCMNNKCRCYT 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 Brazilian scorpion Tityus sample 6887 Tityus serrulatus VENOM database_2 pdbx_nmr_software pdbx_struct_assembly pdbx_struct_oper_list chem_comp_atom chem_comp_bond repository Initial release Version format compliance Version format compliance Data collection Database references Derived calculations Data collection 1 0 2000-07-19 1 1 2008-04-26 1 2 2011-07-13 1 3 2022-02-16 1 4 2023-12-27 _database_2.pdbx_DOI _database_2.pdbx_database_accession _pdbx_nmr_software.name RCSB Y RCSB 1999-10-19 REL LEAST RESTRAINT VIOLATION 100 35 COSY DQF-COSY NOESY TOCSY 50 5.0 1 atm 293 K distance geometry 90% WATER/10% D2O BRUNGER refinement X-PLOR 3.8 structure solution Felix 97.2 600 Bruker AM-600 TRP 1 n 1 TRP 1 A CYS 2 n 2 CYS 2 A SER 3 n 3 SER 3 A THR 4 n 4 THR 4 A CYS 5 n 5 CYS 5 A LEU 6 n 6 LEU 6 A ASP 7 n 7 ASP 7 A LEU 8 n 8 LEU 8 A ALA 9 n 9 ALA 9 A CYS 10 n 10 CYS 10 A GLY 11 n 11 GLY 11 A ALA 12 n 12 ALA 12 A SER 13 n 13 SER 13 A ARG 14 n 14 ARG 14 A GLU 15 n 15 GLU 15 A CYS 16 n 16 CYS 16 A TYR 17 n 17 TYR 17 A ASP 18 n 18 ASP 18 A PRO 19 n 19 PRO 19 A CYS 20 n 20 CYS 20 A PHE 21 n 21 PHE 21 A LYS 22 n 22 LYS 22 A ALA 23 n 23 ALA 23 A PHE 24 n 24 PHE 24 A GLY 25 n 25 GLY 25 A ARG 26 n 26 ARG 26 A ALA 27 n 27 ALA 27 A HIS 28 n 28 HIS 28 A GLY 29 n 29 GLY 29 A LYS 30 n 30 LYS 30 A CYS 31 n 31 CYS 31 A MET 32 n 32 MET 32 A ASN 33 n 33 ASN 33 A ASN 34 n 34 ASN 34 A LYS 35 n 35 LYS 35 A CYS 36 n 36 CYS 36 A ARG 37 n 37 ARG 37 A CYS 38 n 38 CYS 38 A TYR 39 n 39 TYR 39 A THR 40 n 40 THR 40 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 LYS 30 A O LYS 30 A N ARG 37 A N ARG 37 2 A A O H MET LYS 32 35 1.55 2 A A HG1 O THR CYS 4 38 1.57 3 A A O H PRO ALA 19 23 1.54 3 A A H O LYS ARG 30 37 1.57 5 A A O H LYS ARG 30 37 1.49 6 A A H O MET LYS 32 35 1.51 7 A A O H LYS ARG 30 37 1.49 7 A A H O LYS ARG 30 37 1.51 10 A A H O MET LYS 32 35 1.51 10 A A O H PRO ALA 19 23 1.54 12 A A HG1 O THR CYS 4 38 1.51 13 A A O H PRO ALA 19 23 1.51 13 A A H O LYS ARG 30 37 1.57 13 A A O H MET LYS 32 35 1.58 14 A A H O MET LYS 32 35 1.47 14 A A O H LYS ARG 30 37 1.53 14 A A H O LYS ARG 30 37 1.57 16 A A O H LYS ARG 30 37 1.51 16 A A O H PRO ALA 19 23 1.59 16 A A H O LYS ARG 30 37 1.60 17 A A O H PRO ALA 19 23 1.55 19 A A H O LYS ARG 30 37 1.60 20 A A O H MET LYS 32 35 1.54 20 A A O H PRO ALA 19 23 1.57 20 A A H O LYS ARG 30 37 1.57 20 A A O H LYS ARG 30 37 1.59 22 A A O H PRO ALA 19 23 1.56 23 A A O H MET LYS 32 35 1.51 25 A A O H LYS ARG 30 37 1.48 25 A A H O MET LYS 32 35 1.51 27 A A H O LYS ARG 30 37 1.53 27 A A O H LYS ARG 30 37 1.56 28 A A O H PRO ALA 19 23 1.56 30 A A O H MET LYS 32 35 1.60 31 A A O H MET LYS 32 35 1.59 32 A A O H MET LYS 32 35 1.59 34 A A O H LYS ARG 30 37 1.57 35 A A HG1 O THR CYS 4 38 1.50 35 A A H O LYS ARG 30 37 1.58 35 A A O H MET LYS 32 35 1.59 35 A A O H LYS ARG 30 37 1.59 1 A SER 3 -153.61 -57.68 1 A CYS 10 -49.13 177.22 2 A SER 3 -91.38 -81.46 2 A PHE 24 -90.35 -69.11 2 A ALA 27 -69.70 66.07 3 A SER 3 -104.31 -85.30 3 A HIS 28 -164.49 78.79 3 A LYS 30 -138.31 -143.70 4 A SER 3 -101.56 -76.38 4 A ALA 23 -90.46 -72.90 4 A LYS 30 -124.55 -168.25 5 A CYS 2 -57.95 175.21 5 A SER 3 -84.32 -90.25 5 A THR 4 -59.42 84.77 6 A SER 3 -82.61 -95.20 6 A PHE 24 -81.18 -88.37 6 A ALA 27 -68.07 90.08 7 A CYS 2 -148.90 -156.47 7 A SER 3 -155.92 -34.63 7 A ALA 27 -59.01 83.83 8 A CYS 2 -39.66 106.52 8 A SER 3 -78.87 -90.06 8 A THR 4 -63.20 82.25 8 A ALA 27 -88.82 49.99 8 A LYS 30 -162.36 -141.16 8 A ASN 34 59.66 15.47 9 A CYS 2 -160.43 62.72 9 A THR 4 -90.65 43.88 9 A ASP 7 -98.01 30.86 9 A ALA 23 -90.08 -73.52 9 A HIS 28 -168.06 108.45 9 A LYS 30 -132.52 -154.70 9 A ASN 34 72.58 -1.41 10 A CYS 2 -159.82 -152.75 10 A SER 3 -78.78 -71.55 10 A THR 4 -86.62 39.79 10 A PHE 24 -90.96 -73.80 10 A ALA 27 -64.86 92.68 10 A HIS 28 -164.56 104.96 11 A CYS 2 -81.49 -153.66 11 A SER 3 -83.57 -75.22 11 A HIS 28 -161.92 82.93 11 A ASN 34 58.23 14.92 12 A SER 3 -110.23 -77.87 12 A THR 4 -86.09 43.09 12 A LYS 30 -133.09 -155.42 12 A ASN 34 56.69 16.21 13 A PHE 24 -87.82 -78.30 13 A ARG 26 -100.96 74.62 13 A ALA 27 -47.89 90.86 13 A HIS 28 -164.56 87.34 13 A ASN 34 55.50 17.60 14 A CYS 2 -58.61 -141.83 14 A SER 3 -133.73 -91.85 14 A LYS 22 -90.21 -63.78 14 A PHE 24 -90.08 -69.26 14 A HIS 28 -169.35 90.89 15 A SER 3 -133.46 -68.61 15 A PHE 24 -90.58 -76.61 15 A ALA 27 -50.15 88.57 16 A CYS 2 -102.08 -168.56 16 A SER 3 -147.73 -74.82 16 A ASP 7 -87.57 34.89 16 A ALA 27 -44.76 92.66 16 A HIS 28 -161.16 83.10 17 A SER 3 -130.61 -83.47 17 A ALA 23 -48.20 -70.01 17 A PHE 24 -90.38 -62.31 17 A ALA 27 -60.19 94.67 17 A ASN 34 59.24 14.92 18 A SER 3 -69.47 -133.41 18 A CYS 10 -100.89 -169.27 18 A ALA 27 -88.34 36.21 19 A SER 3 -102.84 -118.81 19 A THR 4 -88.68 48.73 19 A ALA 27 -80.21 49.07 19 A HIS 28 -107.07 78.91 19 A LYS 30 -140.04 -147.94 19 A ASN 34 58.17 17.98 20 A CYS 2 -134.12 -152.53 20 A SER 3 -148.96 -71.12 20 A ALA 23 -68.09 -71.55 21 A SER 3 -97.30 -83.49 21 A ALA 27 -56.31 101.99 21 A HIS 28 -164.94 86.24 21 A ASN 33 57.13 17.96 21 A ASN 34 74.60 -0.91 22 A SER 3 -85.29 -140.88 22 A CYS 10 -110.28 -169.48 22 A ALA 23 -68.72 -72.32 22 A PHE 24 -90.56 -74.97 22 A LYS 30 -168.22 -151.86 22 A ASN 34 58.57 12.74 22 A TYR 39 -60.75 -164.59 23 A CYS 2 -153.55 79.98 23 A THR 4 -90.19 57.96 23 A ALA 23 -90.53 -74.88 23 A PHE 24 -88.36 -74.95 23 A ALA 27 -68.30 61.54 24 A THR 4 -89.87 33.84 24 A ASN 34 55.16 17.97 25 A SER 3 -108.90 -91.88 25 A THR 4 -59.08 79.97 25 A ALA 23 -90.64 -71.71 25 A ALA 27 -69.65 68.69 26 A SER 3 -149.83 -60.92 26 A THR 4 -90.69 54.11 26 A ALA 23 -86.02 -75.93 26 A HIS 28 -162.45 81.51 26 A ASN 34 56.65 16.01 27 A THR 4 -89.93 33.82 27 A ALA 23 -90.54 -69.61 27 A ALA 27 -65.35 65.57 27 A LYS 30 -153.95 -156.81 28 A SER 3 -86.16 -93.93 28 A ASP 7 -95.10 42.74 28 A PHE 24 -90.41 -78.88 28 A ALA 27 -57.17 85.91 29 A CYS 2 -75.37 -157.76 29 A SER 3 -142.81 -57.86 29 A ALA 23 -87.27 -75.89 29 A LYS 30 -119.00 -156.78 30 A CYS 10 -71.57 -167.41 30 A ALA 23 -90.55 -70.19 30 A ALA 27 -59.95 80.00 30 A LYS 30 -127.90 -133.10 30 A ASN 34 75.02 -3.79 31 A SER 3 -83.59 -143.38 31 A ALA 23 -80.34 -72.94 31 A HIS 28 -152.03 81.32 31 A ASN 34 55.01 19.71 32 A SER 3 -70.46 -127.03 32 A HIS 28 -152.98 83.04 32 A LYS 30 -143.27 -143.42 32 A ASN 34 72.83 -2.28 33 A SER 3 -87.69 -96.14 33 A HIS 28 -170.58 71.01 33 A TYR 39 -60.60 -166.75 34 A CYS 2 -120.34 -131.84 34 A SER 3 -136.10 -95.22 34 A PHE 24 -90.64 -69.96 34 A ALA 27 -49.33 101.04 34 A HIS 28 -167.14 97.94 35 A SER 3 -138.71 -73.11 35 A THR 4 -90.51 32.59 35 A ALA 23 -90.02 -72.22 35 A ALA 27 -69.88 55.65 NMR SOLUTION STRUCTURE OF BUTANTOXIN 1 N N A SER 13 A SER 13 HELX_P A ALA 23 A ALA 23 1 1 11 disulf 2.021 A CYS 2 A SG CYS 2 1_555 A CYS 5 A SG CYS 5 1_555 disulf 2.022 A CYS 10 A SG CYS 10 1_555 A CYS 31 A SG CYS 31 1_555 disulf 2.018 A CYS 16 A SG CYS 16 1_555 A CYS 36 A SG CYS 36 1_555 disulf 2.019 A CYS 20 A SG CYS 20 1_555 A CYS 38 A SG CYS 38 1_555 TOXIN BUTANTOXIN, TOXIN SCK4_TITSE UNP 1 1 P59936 1 40 1C55 1 40 P59936 A 1 1 40 2 anti-parallel A GLY 29 A GLY 29 A MET 32 A MET 32 A LYS 35 A LYS 35 A CYS 38 A CYS 38 1 P 1