Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 1ocyA 2xgfA 1ocyA 100 55 2xgfA 55 100 FOLD SIMILARITY (Z-SCORE) 1ocyA 2xgfA 1ocyA 22.7 8.5 2xgfA 8.5 17.8