Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1b5eA 1h9mA 3hulA 1b5eA 100 29 78 1h9mA 21 100 70 3hulA 0 65 100 FOLD SIMILARITY (Z-SCORE) 1b5eA 1h9mA 3hulA 1b5eA 41.8 0 0 1h9mA 0 29.2 0 3hulA 0 0 49.8