Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1u2mA 1u2mB 1ufyA 1u2mA 100 63 0 1u2mB 63 100 0 1ufyA 0 0 100 FOLD SIMILARITY (Z-SCORE) 1u2mA 1u2mB 1ufyA 1u2mA 18.5 13.4 0 1u2mB 13.4 19.1 0 1ufyA 0 0 27.3