Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 1pcfA 4bhmA 4bhmB 1pcfA 100 35 34 4bhmA 35 100 97 4bhmB 34 97 100 FOLD SIMILARITY (Z-SCORE) 1pcfA 4bhmA 4bhmB 1pcfA 13.2 9.9 9.7 4bhmA 9.9 15.7 13.4 4bhmB 9.7 13.4 15.3