Chain B ( I67 L68 L69 P70 V71 C72 R73 L76 D95 R96 N97 L98 T99 F100 H101 K102 M103 V104 A105 W106 I108 L188 I189 I190 T191 S192 S193 T194 K195 T196 I197 R198 R199 S200 Y201 F202 E203 V204 F205 W206 Y207 T208 H209 H210 F212 P276 M277 Y280 R284 I308 G322 Y324 F326 V332 S333 L335 E336 W337 H338 P339 F340 T341 H354 I355 R356 I357 V358 G359 D360 W361 T362 L365 G392 T393 A394 E396 G538 P539 E540 A543 E544 S547 F565 K567 E568 N569 F570 )