Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3ku3B 3t5sA 4gb5A 5mwnA 3ku3B 100 40 10 36 3t5sA 41 100 17 49 4gb5A 20 21 100 69 5mwnA 61 39 64 100 FOLD SIMILARITY (Z-SCORE) 3ku3B 3t5sA 4gb5A 5mwnA 3ku3B 23.9 0 0 0.2 3t5sA 0 23.3 0 2.2 4gb5A 0 0 30.6 0 5mwnA 0.5 0 0 42.3