Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1svfA 1u7gA 2qihA 1svfA 100 3 3 1u7gA 0 100 0 2qihA 6 48 100 FOLD SIMILARITY (Z-SCORE) 1svfA 1u7gA 2qihA 1svfA 7.7 0 4.1 1u7gA 0 77.8 0 2qihA 4.1 0 9.3