Chain A ( L26 E33 R37 Y40 Y41 R44 Y74 G75 S76 L77 I78 Y79 M80 T81 S82 I83 P84 G85 G86 W87 D90 G134 K137 P138 N139 I140 S141 N142 I143 V144 G145 D156 A157 G158 F159 V160 I161 F162 Y163 M164 S165 V166 N167 M168 A170 L171 P174 T220 L267 G268 I269 L271 P272 F276 T288 E289 R290 S291 R292 V293 K294 A295 F296 I297 P298 L299 F300 I301 L302 G303 M304 V305 F306 W307 A308 Q310 E311 F343 Q344 S345 I346 N347 P348 L349 I351 L352 A355 I358 S359 L361 W362 Q363 L365 G366 T367 Q369 P370 S371 L372 P373 V374 K375 F376 A377 I378 G379 T380 F381 L382 A383 G384 S410 Y411 I412 I413 C414 V415 I416 G417 E418 L419 C420 L421 S422 P423 T424 G425 N426 S427 A428 A429 V430 K431 L432 A433 P434 K435 F437 N438 A439 Q440 M441 M442 S443 I444 W445 Y446 L447 T448 N449 A450 S451 A452 Q453 A479 I480 V482 T483 V486 I493 M497 G499 I500 R501 )