Chain A ( R439 L503 L504 S507 I509 A520 V521 D523 I524 V525 A526 F527 Y528 Q529 D530 T531 S532 E533 P535 K542 F543 E641 G642 Q643 F644 I645 P646 S647 R648 P649 A650 P651 N931 I957 G958 Q959 G960 A961 S962 G963 V965 A979 I980 K981 M983 L985 Q987 Q988 P989 K990 K991 E992 L993 I994 N996 E997 M1001 N1008 I1009 V1010 N1011 L1022 V1024 M1026 S1033 T1035 T1039 T1055 L1056 K1057 G1058 L1059 K1060 F1061 L1062 H1063 V1067 I1068 H1069 R1070 D1071 I1072 K1073 S1074 D1075 N1076 I1077 L1078 K1086 I1087 T1088 D1089 F1090 G1091 F1092 C1093 A1094 I1096 K1102 R1103 I1104 T1105 M1106 V1107 G1108 T1109 P1110 Y1111 W1112 M1113 A1114 I1117 V1118 R1120 Y1123 V1127 D1128 V1129 W1130 S1131 L1132 G1133 I1134 M1135 I1136 I1137 E1138 M1139 E1141 G1142 E1143 P1144 P1145 Y1146 L1147 E1149 T1150 P1151 L1152 R1153 A1154 L1155 Y1156 L1157 I1158 )