Chain A ( F282 C285 Q286 S289 K319 Y320 H323 E324 I326 Y327 T328 L330 A331 R357 P359 F360 G361 D362 F363 M364 E365 P366 K367 F368 E369 F370 A371 K373 F374 L377 D396 R397 P398 K434 L435 L436 Q437 K438 M439 T440 D441 L442 R443 Q444 I445 V446 T447 E448 H449 V450 Q451 L452 L453 Q454 V455 I456 L465 L468 L469 Q470 E471 I472 Y473 K474 D475 L476 Y477 ),  Chain B ( E324 Y327 P366 K367 F370 K373 D396 R397 P398 G399 L436 Q437 K438 M439 T440 D441 L442 R443 Q444 I445 V446 T447 E448 Q451 )