Chain A ( K516 ),  Chain C ( I432 S433 H434 S435 A436 S437 A438 T439 G440 N441 V442 C443 I444 E445 E446 I447 D448 V449 D450 F453 R455 L456 K457 N458 T459 S460 Q462 Q464 A492 G493 Q494 T495 V527 K528 V529 I530 L531 V539 A540 Q541 R542 S543 T544 ),  Chain B ( I432 S433 H434 S435 A436 S437 A438 T439 G440 N441 V442 C443 I444 E445 E446 I447 D448 V449 F453 I454 R455 L456 K457 N458 T459 S460 T495 V496 T497 I498 W499 D512 V539 A540 Q541 R542 S543 T544 V545 F546 )