Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 4nqlA 4nqlB 5ldaA 5ldaB 4nqlA 100 7 56 6 4nqlB 3 100 0 7 5ldaA 55 10 100 7 5ldaB 6 7 0 100 FOLD SIMILARITY (Z-SCORE) 4nqlA 4nqlB 5ldaA 5ldaB 4nqlA 37.2 0 13.9 0 4nqlB 0 19 0 5.7 5ldaA 14 0 30 0 5ldaB 0 5.7 0 14.5