Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2g3mD 4cybA 4cybD 4dz4A 2g3mD 100 0 0 66 4cybA 66 100 99 0 4cybD 66 99 100 0 4dz4A 83 0 0 100 FOLD SIMILARITY (Z-SCORE) 2g3mD 4cybA 4cybD 4dz4A 2g3mD 66.8 0 0 0 4cybA 0 32.4 31.3 0 4cybD 0 31.3 32.5 0 4dz4A 0 0 0 61.8