Chain A ( I33 M34 E35 V36 D37 R38 E39 A40 K41 E42 G43 L44 K45 G47 E48 T49 K51 H52 A53 V54 S55 R56 G57 T58 A59 K60 L61 R62 W63 F64 V65 V70 P72 I77 D78 L79 G80 C81 G82 R83 G84 G85 W86 S87 Y88 Y89 C90 A91 G92 L93 V99 G101 Y102 T103 K104 G105 G106 P107 G108 H109 E110 E111 P112 I113 P114 M115 A116 T117 Y118 W120 V123 L125 H126 S127 G128 K129 V131 M134 L142 L143 C144 D145 I146 G147 E148 F176 C177 I178 K179 R205 N206 L208 S209 R210 T213 E215 M216 Y217 V219 S220 Y250 E251 R252 D253 V254 D255 L256 G257 D343 F347 G348 R351 E462 F463 G464 K465 A466 K467 G468 )