Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3qr7A 4ru3A 4ufqB 3qr7A 100 10 0 4ru3A 82 100 0 4ufqB 9 0 100 FOLD SIMILARITY (Z-SCORE) 3qr7A 4ru3A 4ufqB 3qr7A 13 2.3 0 4ru3A 2.7 23.7 0 4ufqB 0 0 22.1