Chain A ( T729 L730 G731 E732 G733 E734 F735 G736 K737 V738 V739 A756 V757 K758 M759 L760 K761 E762 N763 A764 S765 S767 E768 V804 Y806 S811 R813 R817 E818 K821 H872 R873 D874 R878 N879 S891 D892 F893 G894 L895 K907 Q910 G911 R912 I913 P914 V915 K916 W917 M918 Y928 N950 P951 Y952 P953 G954 I955 P957 ),  Chain B ( T729 L730 G731 E732 G733 E734 F735 G736 K737 V738 V739 A756 V757 K758 M759 L760 K761 E762 N763 A764 S765 P766 S767 E768 L769 D771 E775 I788 P799 V804 E805 Y806 S811 R813 R817 H872 R873 D874 L875 A876 R878 N879 L881 S891 D892 F893 G894 L895 R912 I913 P914 K916 W917 S936 N950 P951 P953 G954 )