Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 4ppmA 5h7dA 4ppmA 100 87 5h7dA 86 100 FOLD SIMILARITY (Z-SCORE) 4ppmA 5h7dA 4ppmA 71.8 51.4 5h7dA 51.4 70.9