Chain A ( M801 D802 I803 S804 N805 V806 L807 I810 M844 Q851 I860 V861 L863 E864 V865 I866 L867 K868 T869 L870 L871 R872 S873 T874 V875 V876 F877 I878 F879 L880 D963 ),  Chain B ( E854 N855 C856 G857 I858 F859 M862 R975 Q979 F1020 C1021 F1022 L1023 F1024 C1025 T1026 G1027 E1028 ),  Chain D ( L880 I946 F947 V951 )