Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2ymaA 2ymaB 6ehiA 6ehiB 2ymaA 100 99 23 30 2ymaB 99 100 17 18 6ehiA 23 17 100 99 6ehiB 30 18 99 100 FOLD SIMILARITY (Z-SCORE) 2ymaA 2ymaB 6ehiA 6ehiB 2ymaA 27.2 24.3 0 0 2ymaB 24.3 29.1 0 0 6ehiA 0 0 33.6 31.7 6ehiB 0 0 31.7 33.6