Abstract
A DNA polymerase fraction was isolated from a pol A − 1 strain. Several characteristics distinguish this activity. The polymerase preparation preferentially uses single-strand DNA including φ× DNA as template. ATP stimulates the rate of synthesis approximately three times. The effect of ATP is specific; other ribonucleotide triphosphates are not effective. The complete temperature sensitivity of the fraction obtained from a dnaE mutant indicates that DNA polymerase III participates in the reaction.
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