palena cm, gonzalez dh, chan rl: a monomer-dimer equilibrium modulates the interaction of the sunflower homeodomain leucine-zipper protein hahb- with dna. biochem j. , : - . / - : . cas pubmed central pubmed google scholar . palena cm, tron ae, bertoncini cw, gonzalez dh, chan rl: positively charged residues...