Chain A ( A21 L22 L23 G24 N25 L26 W27 V28 I29 S30 T31 V32 L33 N34 Q35 V36 H37 N38 K39 F40 L42 Q48 H49 R50 K51 R52 T53 M54 Q55 N56 S57 V58 T59 V60 Y61 L62 L63 A64 L65 S66 V67 V68 D69 L70 I71 A104 L108 S109 L112 L113 L116 D119 R120 A123 V124 V130 R133 Q134 A135 R136 A138 S139 L142 Y204 L208 V211 N229 H231 S232 N233 I234 S235 L236 S237 H238 I239 L240 K241 S242 S243 A244 S245 V246 V247 T248 F249 Y250 Q337 S338 F340 N341 W342 L343 F344 Y345 S346 F347 L348 N349 H350 N351 L352 R353 H354 S355 S356 T357 Y358 G359 S360 S361 I362 F363 P364 R365 L366 F367 C368 N369 N370 F371 C372 S373 R376 )