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A single mutation in bacteriophage T4 DNA polymerase (A737V, tsL141) decreases its processivity as a polymerase and increases its processivity as a 3'-->5' exonuclease.

The Journal of biological chemistry - 7 Jan 1994

Spacciapoli P, Nossal N G

Abstract excerpt

The bacteriophage T4 DNA polymerase mutant A737V (tsL141 and tsCB120) was originally characterized as temperature-sensitive for DNA replication and an antimutator for transition mutations. Its antimutator phenotype is suppressed by the L771F mutation (Reha-Krantz, L. J., Stocki, S., Nonay, R., and Maughan, C. (1989) J. Cell. Biochem. 13D, 140). We find that the A737V polymerase arrests much more frequently than...

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PMID: 8276833

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