Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1y4mA 3wmiA 4jf3A 4usxA 1y4mA 100 18 6 3 3wmiA 8 100 10 0 4jf3A 6 2 100 0 4usxA 0 0 0 100 FOLD SIMILARITY (Z-SCORE) 1y4mA 3wmiA 4jf3A 4usxA 1y4mA 9.5 2.7 3.1 0 3wmiA 2.8 7.3 3.5 1.8 4jf3A 3.1 3.8 13.9 1.3 4usxA 0 0 0 21.1