Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2y48A 2y48B 4czzA 4czzB 2y48A 100 0 100 49 2y48B 43 100 44 100 4czzA 100 44 100 49 4czzB 45 97 49 100 FOLD SIMILARITY (Z-SCORE) 2y48A 2y48B 4czzA 4czzB 2y48A 61.4 0 58.1 1.3 2y48B 1.3 16.3 1.5 13.7 4czzA 58.1 1.5 61.7 1.3 4czzB 1.2 13.7 1.3 16.8