Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2rbdA 2rbdB 2x0xC 4mz7A 4mz7B 2rbdA 100 98 13 44 44 2rbdB 98 100 16 44 44 2x0xC 39 42 100 100 100 4mz7A 52 41 66 100 98 4mz7B 52 41 79 98 100 FOLD SIMILARITY (Z-SCORE) 2rbdA 2rbdB 2x0xC 4mz7A 4mz7B 2rbdA 28.8 26.7 0.8 0.5 0.6 2rbdB 26.7 28.5 0.2 0.5 0.6 2x0xC 2.2 2.3 74.1 0 0 4mz7A 1.5 0.8 0 64.8 62.6 4mz7B 1.5 0.8 0 62.6 64.9