Chain A ( A32 V35 L36 V37 V38 E39 I40 L41 E42 N43 L44 A45 Y46 L47 A48 N49 A50 S51 L53 V72 T73 F75 M76 A79 F80 A83 G86 G87 S90 D91 A152 V155 G156 G157 I158 K159 G160 S161 L162 A163 S164 H165 G166 A167 E168 R181 S182 T183 F184 F185 N186 Y187 F188 V189 F190 C191 L192 A193 G195 A196 L197 A199 V200 V203 T354 L357 N358 C359 C360 L361 A362 Q363 L364 S365 S388 L389 P390 I391 F392 P393 V394 F396 I397 M398 L400 A401 D405 R427 M439 A473 L474 Q475 Y476 L477 F478 L479 G480 S481 A482 D483 L484 F485 T486 L487 A488 G489 L490 L491 E492 Y493 F494 F495 R503 S504 A506 T507 S508 S510 W511 L514 Y518 )