Chain A ( M295 R329 S333 C334 M336 E337 M340 L343 M344 G372 I373 E375 I376 M379 L380 T383 S408 S409 Y411 H464 V465 R466 H467 A468 S469 N470 K471 G472 M473 E474 H475 L476 L477 ),  Chain B ( M295 R329 S333 C334 M336 E337 M340 L343 M344 G372 I373 E375 I376 M379 L380 T383 S408 S409 Y411 H464 V465 R466 H467 A468 S469 N470 K471 G472 M473 E474 H475 L476 L477 )