Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1wt6A 1wt6B 5appA 1wt6A 100 6 6 1wt6B 6 100 6 5appA 2 1 100 FOLD SIMILARITY (Z-SCORE) 1wt6A 1wt6B 5appA 1wt6A 7.6 6.5 3.4 1wt6B 6.1 7.7 3.6 5appA 3.3 2.7 8.9