Chain A ( R110 I111 C112 A113 L114 W115 P117 Y120 Y121 V192 L195 L196 K197 T198 R199 K200 M201 R202 K203 V204 Q205 A209 M210 I211 R212 K213 K214 E215 D216 K217 W218 A219 S220 R221 F224 Y225 S279 )