Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1t6sA 3zeuD 3zeuE 1t6sA 100 32 50 3zeuD 29 100 68 3zeuE 15 69 100 FOLD SIMILARITY (Z-SCORE) 1t6sA 3zeuD 3zeuE 1t6sA 21.9 0 0 3zeuD 0 43.9 18.4 3zeuE 0.1 18.5 61.5