Chain A ( L172 K173 Y176 P177 P178 E179 H180 E181 P182 S183 I184 P185 E186 N187 L188 E189 K191 L192 Y193 G195 K196 L197 I198 V199 A200 V201 H202 E204 V209 F210 S211 F212 V214 S215 P216 N217 P220 V247 L248 Q249 V250 S251 G252 R253 V254 E255 Y256 V257 F258 H261 P262 L263 I264 Q265 F266 Q267 Y268 I269 R270 N271 C272 V273 M274 N275 R276 A277 L278 P279 H280 F281 I282 L283 V284 K288 I289 S631 D632 E633 E634 L635 S636 Q637 Y638 L639 L640 Q641 R663 N667 R669 I670 F673 H677 S760 P761 L762 N763 P764 C765 V766 I767 L768 S769 L788 Y790 N792 F795 G796 E797 D798 S799 V800 G801 V802 L817 Q818 M819 L820 R821 L822 M823 D824 L825 L826 W827 K828 E829 A830 G831 L832 D833 L834 R835 M836 L837 P838 Y839 G840 C841 L842 L850 E852 V853 V854 S855 T856 S857 L885 Y888 N889 R896 A897 E899 E900 F901 T902 L903 S904 K928 K929 T930 G931 Q932 C985 D988 A989 I992 L993 )