Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2elcA 3ih5A 4nocA 4nocB 2elcA 100 50 37 20 3ih5A 49 100 51 34 4nocA 32 50 100 98 4nocB 18 43 96 100 FOLD SIMILARITY (Z-SCORE) 2elcA 3ih5A 4nocA 4nocB 2elcA 63.6 2.1 0 0 3ih5A 2 39.8 0 0 4nocA 0 0 27.1 21.3 4nocB 0 0 21.3 26.8