Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2o4cA 3vvyA 2o4cA 100 28 3vvyA 58 100 FOLD SIMILARITY (Z-SCORE) 2o4cA 3vvyA 2o4cA 64.6 0 3vvyA 0 34.5