Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 1vddB 2douA 2douB 1vddB 100 94 100 2douA 87 100 99 2douB 87 99 100 FOLD SIMILARITY (Z-SCORE) 1vddB 2douA 2douB 1vddB 28 0.9 0.8 2douA 0.9 67.2 62.6 2douB 1.1 62.6 66