Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1e4mM 1nbaA 2nujA 1e4mM 100 72 68 1nbaA 71 100 25 2nujA 68 78 100 FOLD SIMILARITY (Z-SCORE) 1e4mM 1nbaA 2nujA 1e4mM 72.1 0.6 0 1nbaA 0.6 43.7 0 2nujA 0 0 31.8