Chain A ( W12 E15 R38 N39 A40 N41 L42 S43 T44 E66 V69 F70 C72 I73 N74 Q75 T76 A77 E78 Q79 Q80 E81 L82 E83 D84 E85 Q86 R87 R88 L89 C90 D91 V92 Q93 P94 F95 R104 E105 G106 D107 R108 V109 K110 K111 L112 I113 N114 S115 Q116 I117 S118 L119 L120 I121 G122 K123 G124 L125 H126 E127 C147 E148 A151 A152 H247 M285 E288 Q289 N291 P294 R641 F648 W649 L651 R652 S653 E654 M655 V660 A661 F664 G665 I667 L668 E669 A670 Y671 C672 R673 G674 S675 T676 H677 H678 M679 K680 V681 L682 M683 K684 Q685 G686 E687 A688 L689 S690 K691 L692 K693 L695 C718 Q721 E722 A723 Y724 L725 E726 A727 L728 S729 H730 L731 Q732 P734 L740 L741 A742 I761 Y763 I776 I777 F778 T818 G819 G823 L824 )