Abstract
AbstractDNA from bacteriophage T7 was irradiated at long ultraviolet wavelengths in the presence of silver ions. Such treatment leads to selective production of thymine: thymine dimers in DNA. The DNA was melted and the renaturation rate was determined as a function of thymine dimer content and renaturation temperature. Under “normal” hybridization conditions little change in the renaturation rate was observed even when 30% of the thymine was dimerized. This result is consistent with the view that up to a 15% change in the primary sequence of DNA dose not appreciably change the renaturation rate.
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