Chain A ( F77 E78 R79 I80 N81 R82 K83 D84 L85 W86 E87 R88 G89 Q90 R91 L161 L162 V163 S167 N168 P169 M170 Q171 V172 Q173 Q174 Q175 L176 L177 D178 T179 G180 R181 G182 H183 A184 R185 T186 V187 G188 H189 Q190 A191 S192 P193 G217 A218 A219 I221 E361 I362 L363 G364 R370 E395 P396 T399 M400 F402 V403 R429 T430 T431 E552 R553 L558 R561 L606 Q607 Q608 G609 S610 L611 E612 F613 F614 S615 Y618 E619 Q621 V635 I636 V637 V638 S639 N640 I641 A642 S643 K644 M645 E646 H647 M648 V649 S650 S651 F652 C653 L654 L663 H664 L665 Y666 G667 A668 T669 Y670 S671 A672 D673 P692 E693 R694 T695 V696 L697 L698 Y701 S719 L720 Y721 R722 N723 A724 K750 R751 C752 R753 S778 G779 N780 )