Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2raeA 3k21A 4kprE 6fmuA 2raeA 100 27 0 54 3k21A 23 100 66 29 4kprE 0 0 100 86 6fmuA 54 29 86 100 FOLD SIMILARITY (Z-SCORE) 2raeA 3k21A 4kprE 6fmuA 2raeA 34.5 0.5 0.7 0 3k21A 0.3 31.2 0 0 4kprE 0 0 62 55.1 6fmuA 0 0 55.1 62.1