Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2gk3A 2qeeA 2rijA 4a25A 2gk3A 100 70 74 0 2qeeA 66 100 73 56 2rijA 69 84 100 0 4a25A 0 47 75 100 FOLD SIMILARITY (Z-SCORE) 2gk3A 2qeeA 2rijA 4a25A 2gk3A 45.8 0.7 0 0 2qeeA 0.9 68.5 0 1.9 2rijA 0 0 58.7 0 4a25A 0 1.4 1.4 31.2