Chain A ( R5 T6 E7 N8 P9 V10 I11 M12 G13 Y312 Y313 A314 Y315 V316 T317 E318 Q320 K321 H323 C324 L325 N326 T327 L328 F329 S330 R331 L332 Q333 I334 V405 V406 I407 N408 F411 P412 L433 I435 N436 L437 I438 T439 Y440 D441 D442 R443 N445 L446 K447 E450 I457 K458 P459 I460 P461 S462 N463 I464 D465 Y469 )