Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 1ydyA 2gb7A 3tsnA 1ydyA 100 79 44 2gb7A 79 100 36 3tsnA 43 75 100 FOLD SIMILARITY (Z-SCORE) 1ydyA 2gb7A 3tsnA 1ydyA 58.6 1.4 0.4 2gb7A 1.5 45 0 3tsnA 0.3 0.7 61.2