Chain A ( I253 I255 Y349 A351 E352 P353 A354 G355 P356 D357 G358 I359 L360 V361 E362 V363 D364 L365 V366 Q367 A368 L382 R390 Q391 Q394 G395 G396 L397 V400 I416 A417 V418 L419 G420 K421 A422 G423 Q424 G425 K426 S427 Y428 W429 A430 G431 A432 V433 S434 R435 A436 W437 A438 C439 G440 R441 V448 F449 S450 V451 P452 C453 H454 C455 L456 N457 R458 L465 Q466 D467 L468 L469 F470 S471 L472 L496 I497 L498 D499 G500 F501 E502 E503 L504 E505 F510 L529 F533 L544 L545 T546 A547 R548 P549 R550 G551 R552 L553 V554 Q555 S556 L557 F564 E565 L566 S567 G568 F569 Y577 Y581 L604 L605 S606 H607 S608 H609 S610 P611 T612 L613 C614 R615 A616 V617 C618 Q619 L637 L640 Y641 K662 L663 A664 W665 E666 L667 G668 R669 H671 Q672 S673 T674 L675 Q676 E677 F680 M690 G693 L694 V695 Q696 H697 P698 P699 R700 A701 A702 E703 S704 E705 L706 A707 F708 P709 S710 F711 L712 L713 Q714 C715 F716 L717 G718 A719 D748 N749 W750 L751 E752 G753 V754 F757 R839 )