Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2wx4A 2wx4B 2yalA 2wx4A 100 9 11 2wx4B 6 100 0 2yalA 10 0 100 FOLD SIMILARITY (Z-SCORE) 2wx4A 2wx4B 2yalA 2wx4A 6.6 1.2 0.6 2wx4B 1.3 7.3 2.7 2yalA 1 2.7 7.1