Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 1erzA 2vr5A 4cthA 1erzA 100 39 67 2vr5A 100 100 89 4cthA 73 76 100 FOLD SIMILARITY (Z-SCORE) 1erzA 2vr5A 4cthA 1erzA 56.5 0 0 2vr5A 0.3 71.8 0 4cthA 0 0 69.8