Chain A ( L76 R77 H78 D79 A80 S84 A85 P86 L87 G88 T89 S90 E91 I92 V93 L94 S493 T528 K529 L531 A532 L533 D534 K535 S536 Q538 M566 F569 V570 L571 A572 V573 I574 V575 D576 G577 H578 R579 R580 G581 Q582 L611 Q614 W615 L618 K622 E625 D626 Q651 P652 E653 V654 R655 A656 A657 V659 F660 T664 D667 L707 E711 V714 R718 R958 S959 L960 L961 P962 L963 S964 T965 I966 Y967 G968 W969 S970 C971 G972 H973 F974 S975 K976 L978 )