Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 2nn3C 2nn3D 3hdoA 2nn3C 100 97 65 2nn3D 97 100 70 3hdoA 66 69 100 FOLD SIMILARITY (Z-SCORE) 2nn3C 2nn3D 3hdoA 2nn3C 43.2 37.6 2.9 2nn3D 37.6 44.8 2.2 3hdoA 2.7 2.7 60.1