Abstract
The interaction of Hg 2+ and methyl mercury hydroxide with minimally structured and helical polyuridylic acid (poly U) has been studied. From spectral and hydrodynamic data it is concluded that both the mercurials destroy the helical form of poly U. Both complex types destroy interbase hydrogen bonds but Hg 2+ replaced native hydrogen bonds by mercury links forming a product with some degree of order. The monovalent mercurial does not do this. Comparison of the mercurated spectra of poly U at low temperature and DNA suggests that the hydrogen-bonded helix form of poly U is at least double stranded.
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