We have previously shown that, in human cells, cruciform DNA-binding activity is due to 14-3-3 proteins (Todd, A., Cossons, N., Aitken, A., Price, G. B., and Zannis-Hadjopoulos, M. (1998) Biochemistry 37, 14317-14325). Here, wild-type and single-and doubleknockout nuclear extracts from the 14-3-3 Saccharomyces cerevisiae homologues Bmh1p and Bmh2p were analyzed for similar cruciform-binding activities in relation to these proteins. The Bmh1p-Bmh2p heterodimer, present in the wild-type strain, bound efficientl…
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