Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1svfA 3etnA 3etnB 1svfA 100 0 5 3etnA 0 100 98 3etnB 0 98 100 FOLD SIMILARITY (Z-SCORE) 1svfA 3etnA 3etnB 1svfA 7.7 0 0.4 3etnA 0 36.9 35.4 3etnB 0 35.4 36.5