Chain A ( R2 V6 N8 R9 D10 V24 L25 E26 H27 G28 G29 C30 E44 L45 T46 K47 T48 T49 A50 K51 V53 A54 L56 T126 G127 N128 L129 V130 Q131 I132 E133 N134 L135 E136 Y137 T138 V139 V140 T161 M163 I164 T165 P166 R167 E186 P187 R188 S189 G190 I191 D192 F193 N194 E195 M196 I197 L198 M199 K200 K203 K204 T205 W206 L207 V208 H209 K210 Q211 L264 A265 G266 A267 T268 E269 V270 D271 S272 N276 H277 M278 F279 A280 G281 H282 L283 K284 E403 Y406 R407 G408 A409 K410 R411 M412 A413 I414 L415 G416 E417 T418 A419 W420 G433 K434 H437 Q438 F440 G441 Y444 T445 M447 F448 G449 G450 V451 S452 W453 M454 I455 R456 I457 I459 G460 T486 L487 F488 L489 G490 F491 T492 V493 Q494 A495 )