Chain A ( A698 P699 N700 Q701 A702 L703 L704 R705 I706 L707 F712 K714 S720 G721 A722 F723 G724 T725 V726 Y727 W731 I740 P741 V742 A743 I744 K745 E746 L747 P753 K754 A755 N756 K757 E758 I759 L760 D761 E762 A763 Y764 V765 M766 A767 S768 V769 D770 N771 P772 H773 V774 C775 R776 L777 L778 G779 I780 C781 L782 T783 S784 T785 V786 Q787 L788 I789 M790 Q791 L792 Q820 G824 Y827 L828 R831 L833 H835 N842 V843 L844 K852 I853 T854 D855 F856 G857 R858 A859 L861 D1012 A1013 D1014 E1015 Y1016 L1017 I1018 )