Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3ptyA 3qguA 3qguB 4whnA 4whnC 3ptyA 100 100 95 15 50 3qguA 67 100 98 34 45 3qguB 61 98 100 43 60 4whnA 66 29 50 100 99 4whnC 52 51 56 99 100 FOLD SIMILARITY (Z-SCORE) 3ptyA 3qguA 3qguB 4whnA 4whnC 3ptyA 47.8 0 0 0 0 3qguA 0 72.4 68.9 0 0 3qguB 0 68.9 70.4 0 0 4whnA 0 0 0 31.1 28.3 4whnC 0 0 0 28.3 31.1