Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3rd3A 4ppmA 5h7dA 3rd3A 100 0 83 4ppmA 0 100 86 5h7dA 62 86 100 FOLD SIMILARITY (Z-SCORE) 3rd3A 4ppmA 5h7dA 3rd3A 33.3 0 0.8 4ppmA 1 71.8 51.4 5h7dA 1.8 51.4 70.9