Abstract
Temperature-sensitive mutations in bacteriophage T4 gene 30 (polynucleotide ligase) were examined for their effects on spontaneous and proflavine-induced frameshift mutagenesis in the rII and ac (acridine resistance) cistrons. Only small (fourfold or less) effects on mutation rates were observed, even when selection artifacts involving suppression of gene 30 mutations by rII mutations were taken into account. The deoxyribonucleic acid ligase gene of T4 therefore appears to be only a minor determinant of frameshift mutation rates. This result is consistent with the particular nature of frameshift mutagenesis in bacteriophage T4.
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Selected References
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