Chain A ( M123 E127 D133 E135 R357 T358 Y361 H362 G363 G364 E365 N370 A399 R401 L402 C403 L404 S405 P421 W424 G425 N426 I427 N428 L429 F430 D431 Y432 V437 M441 L443 N444 W446 P447 V448 P449 H450 G451 L452 E453 D454 L455 L456 N457 P458 I459 G460 V461 T462 G463 S464 N465 P466 N467 F477 L540 L601 L602 D603 C604 N605 Y606 P607 D608 P609 R612 I633 Q634 L635 V636 Q637 V638 L639 K640 Y641 E642 Q643 Y644 L645 D646 N647 L648 L649 V650 R651 F667 F668 H670 L671 E674 M675 N677 K678 T679 V680 S681 Q682 R683 F684 G685 L686 L687 L688 R808 Q809 L812 F937 L938 F1002 S1003 M1004 M1005 L1006 G1007 S1008 G1009 M1010 P1011 E1012 L1013 Q1014 S1015 F1016 D1017 D1018 I1019 )