Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2ymaA 2ymaB 3luyA 3mxoA 4lubA 2ymaA 100 99 25 16 60 2ymaB 99 100 25 33 60 3luyA 59 27 100 21 74 3mxoA 16 26 44 100 27 4lubA 55 60 74 29 100 FOLD SIMILARITY (Z-SCORE) 2ymaA 2ymaB 3luyA 3mxoA 4lubA 2ymaA 27.2 24.3 0 0 0 2ymaB 24.3 29.1 0 0 0.1 3luyA 0 0 46.9 1.3 19.7 3mxoA 0 0 1.5 38.5 0 4lubA 0 0.2 19.7 0 36.9