Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 2a5zA 2a5zC 5a8sA 2a5zA 100 98 42 2a5zC 98 100 45 5a8sA 44 49 100 FOLD SIMILARITY (Z-SCORE) 2a5zA 2a5zC 5a8sA 2a5zA 45 42.8 0 2a5zC 42.8 44.8 0 5a8sA 0 0 40