Chain A ( G22 L23 Y24 D25 Q26 I27 Y28 D29 R30 P31 G32 T130 S132 H133 N134 I135 G137 L138 V172 S173 S174 G175 G176 V177 L178 Q185 D186 A188 E189 M192 Y193 F195 C196 I197 N199 E200 L813 E814 R815 E816 I817 A818 Q819 R820 H821 G822 V943 C944 E945 L946 S947 P948 H949 E950 A953 N954 P955 R956 L957 K958 N959 S960 I961 I962 N964 H965 K968 R971 S972 K1099 V1103 G1117 V1118 V1119 D1120 V1946 P1947 L1948 T1949 T1950 Q1951 E1952 L1953 V1954 L1957 E1958 )