Figure 1

Amino acid-base contacts observed in co-crystal structures. The amino acid residues at -1, +2, +3, and +6 for zif268 are R, D, E and R, while the DNA bases at positions 7, 8, 9 and 10 for wild-type operator of zif268 are G, C, G and T.
Amino acid-base contacts observed in co-crystal structures. The amino acid residues at -1, +2, +3, and +6 for zif268 are R, D, E and R, while the DNA bases at positions 7, 8, 9 and 10 for wild-type operator of zif268 are G, C, G and T.