Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2ncdA 3lnrA 3pssA 2ncdA 100 0 76 3lnrA 0 100 0 3pssA 47 0 100 FOLD SIMILARITY (Z-SCORE) 2ncdA 3lnrA 3pssA 2ncdA 58.4 0 0 3lnrA 0 18.7 0 3pssA 0 0 39.8