Chain A ( M1 D2 I3 P4 P5 L6 Y61 L122 L123 A126 M127 G129 A130 I131 R133 R134 K135 R136 Y137 R138 N139 F140 G141 L142 L145 G186 M187 K188 V189 F190 S191 Q192 P193 R194 A195 L196 T197 S293 W294 L295 P296 D297 L300 C354 L355 Q356 H362 )