Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2fyzA 2fyzB 4p3vA 2fyzA 100 19 17 2fyzB 6 100 11 4p3vA 0 0 100 FOLD SIMILARITY (Z-SCORE) 2fyzA 2fyzB 4p3vA 2fyzA 7.3 2.9 0.6 2fyzB 2.9 5.1 1.2 4p3vA 0 0 14.3