Chain A ( A79 K80 W81 C82 Q83 A84 C85 T86 M87 S89 T90 K107 ),  Chain B ( F77 F78 W81 C82 Q83 A84 L110 V122 K123 S124 L125 P126 T127 D141 H142 ),  Chain C ( A79 W81 C82 Q83 A84 L110 D111 V122 K123 S124 L125 P126 T127 I128 D141 H142 )