Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1xreA 2nybA 4f2nA 4mhxA 5a9gA 1xreA 100 78 77 0 79 2nybA 78 100 78 66 78 4f2nA 77 78 100 73 76 4mhxA 78 66 73 100 67 5a9gA 79 78 76 65 100 FOLD SIMILARITY (Z-SCORE) 1xreA 2nybA 4f2nA 4mhxA 5a9gA 1xreA 38.7 31 28.2 0 30.5 2nybA 31 37.8 29.2 0 29.1 4f2nA 28.2 29.2 41.4 0 28.1 4mhxA 0 0 0 73.5 0 5a9gA 30.5 29.1 28.1 0 40.3