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FIG. 2. Crystal structures of the DBDs of some Zn(II)₂Cys₆ regulators. AlcR binds as a monomer (28), while Gal4p, Put3p, Ppr1p, Leu3p, and Hap1p bind as homodimers. Gal4p, Put3p, and Ppr1p recognize inverted DNA repeats (168, 169, 253, 278). Leu3p and Hap1p bind to everted and direct repeats, respectively (72, 89, 98, 124, 294). Yellow spheres correspond to zinc atoms.

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