Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2ynzA 3s6lA 5xeaA 2ynzA 100 52 47 3s6lA 48 100 74 5xeaA 15 72 100 FOLD SIMILARITY (Z-SCORE) 2ynzA 3s6lA 5xeaA 2ynzA 11 0 0 3s6lA 0 29.8 0 5xeaA 1.5 0 41.9