Chain A ( T118 S121 I124 D125 S126 P127 P128 T129 Y130 N131 Y134 Y136 K137 S138 W139 E140 A141 F142 S143 N144 L145 S146 Y147 Y148 T149 K211 F220 T221 N222 G223 L224 G225 H226 G227 V228 D229 L230 N231 Y234 G235 E236 T237 Q330 T331 S332 R333 L334 I335 L336 I337 G338 I341 F361 L366 K369 Q370 F371 Q372 Y373 Q374 N375 R376 I377 K532 G533 L534 M535 G536 N537 V538 I539 C540 S541 P542 A543 Y544 T549 F550 ),  Chain B ( R44 L117 T118 S119 R120 S121 H122 L123 I124 D125 S126 P127 P128 T129 Y130 N131 A132 D133 Y134 G135 Y136 K137 S138 W139 E140 A141 F142 S143 N144 L145 S146 Y147 Y148 T149 R150 A151 L152 P153 P154 V155 P156 F205 T206 H207 Q208 F209 F210 K211 T212 D213 H214 K215 R216 G217 P218 A219 F220 T221 N222 G223 L224 G225 H226 G227 V228 D229 L230 N231 H232 E236 Q289 W305 R333 L334 L336 I337 T340 I341 V344 Q370 F371 Q372 Y373 Q374 N375 R376 I377 A378 A379 E380 F381 M458 Q461 Y466 R469 F470 G526 A527 P528 F529 L531 K532 G533 L534 M535 G536 N537 V538 I539 C540 S541 Y544 )