Chain A ( L879 V882 V883 H885 W886 L887 R888 R889 D890 E891 A893 A894 E895 C898 S922 F923 K924 A925 A926 R927 A928 L929 L930 G931 C932 A933 K934 A935 E936 S937 G938 P939 A940 S941 L942 T943 I944 C945 A948 F972 L973 D975 L976 L977 L978 V979 V980 R981 T982 S983 L984 W985 R986 Q987 Q988 Q989 E1010 R1084 E1088 D1124 R1125 R1126 L1127 )