Chain A ( Q472 N473 G474 D475 D476 G523 N524 S525 L526 R527 E537 M540 R541 K542 L543 V544 R545 S546 V547 T548 V549 V550 E551 D552 ),  Chain C ( R527 A539 M540 R541 K542 V544 R545 S546 V547 T548 V549 V550 E551 D552 ),  Chain B ( V440 A441 V442 E443 E444 V445 D446 E447 F451 R453 L454 K457 T496 N524 V538 A539 M540 R541 K542 L543 V544 R545 S546 V547 T548 V549 V550 E551 ),  Chain D ( T436 G438 R439 V440 A441 V442 E443 E444 V445 D446 E447 E448 G449 K450 F451 V452 R453 L454 R455 K457 S458 Q462 M464 W467 R471 I497 G523 N524 S525 L526 R527 T528 A529 L530 I531 N532 E536 E537 V538 A539 M540 R541 K542 L543 V544 R545 S546 V547 T548 V549 V550 E551 )