Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1dd4A 4c3sA 4fzwA 4fzwB 1dd4A 100 60 7 7 4c3sA 15 100 91 86 4fzwA 7 81 100 99 4fzwB 7 82 99 100 FOLD SIMILARITY (Z-SCORE) 1dd4A 4c3sA 4fzwA 4fzwB 1dd4A 22.8 0 0 0 4c3sA 0 76.6 0 0 4fzwA 0 0.5 44.7 42.8 4fzwB 0 0 42.8 45