Chain A ( R154 L157 E160 A161 W162 L163 Q164 Y165 S166 F167 P168 L169 Q170 L171 E172 P173 S174 A175 Q176 W178 L183 L185 P186 N187 R188 L190 V192 N193 V194 K195 V207 S208 T209 K210 D211 V212 P213 L216 T240 L241 Q242 V243 N244 G245 R246 H247 E248 Y249 L250 Y251 G252 S253 Y254 P255 L256 C257 Q258 F259 Q260 Y261 I262 C263 S264 C265 L266 H267 S268 P272 H273 L274 T275 V277 L603 T604 D605 D606 E607 L608 F609 Q610 Y611 L612 L613 Q614 R636 A637 L638 A639 N640 R641 K642 I643 G644 H645 F646 L647 F648 W649 H650 L651 S653 Y671 S733 P734 L735 D736 P737 S738 T739 L740 M762 N765 E767 A768 S773 V774 G775 I776 M788 L791 Q792 M793 I794 Q795 L796 M797 D798 V799 L800 W801 K802 Q803 E804 L806 D807 L808 R809 M810 T811 P812 Y813 G814 C815 L816 P817 L824 I825 E826 V827 V828 L829 R830 E873 E874 L877 R902 S904 Q906 I966 L967 R969 H970 L973 F974 L977 )