Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3vcdA 4fqnA 4fqnB 4mg4A 4mg4H 3vcdA 100 20 20 33 33 4fqnA 19 100 99 40 35 4fqnB 19 99 100 24 34 4mg4A 20 39 32 100 98 4mg4H 27 38 31 98 100 FOLD SIMILARITY (Z-SCORE) 3vcdA 4fqnA 4fqnB 4mg4A 4mg4H 3vcdA 37 1.3 1.4 0 0 4fqnA 1.4 22.5 19.4 0 1.2 4fqnB 1.5 19.4 22.2 0.2 1.2 4mg4A 0 0.5 0.3 48 43 4mg4H 0 1.5 1.2 43 46.8