Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 2id6A 5ihfA 5ihfB 2id6A 100 73 75 5ihfA 33 100 95 5ihfB 39 95 100 FOLD SIMILARITY (Z-SCORE) 2id6A 5ihfA 5ihfB 2id6A 34 2.1 1.6 5ihfA 2.3 19.3 14.5 5ihfB 0.6 16 19.5