Chain A ( T81 G82 D83 V94 I95 E96 L97 K98 T99 N100 S108 E109 D110 I111 K112 K113 S134 V135 T136 N137 G138 D273 T275 M283 N376 S377 Y378 D379 T380 I393 G395 N396 M397 S398 E399 G400 P401 V403 D430 D431 L432 E433 V434 T435 F436 N437 S438 S439 R440 K441 M442 K443 I444 K474 G475 A476 K479 R483 S519 L523 R524 V525 L526 D546 A547 D548 E549 R550 L551 K552 A570 I595 T596 G597 D598 Q599 T602 R696 A697 Q698 K702 D721 N724 N741 )