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. 1968 Oct;96(4):939–949. doi: 10.1128/jb.96.4.939-949.1968

Effect of p-Fluorophenylalanine on Chromosome Replication in Escherichia coli1

Carolyn Carpenter a, Stephen B Binkley a
PMCID: PMC252402  PMID: 4879568

Abstract

The effect of p-fluorophenylalanine (FPA) on deoxyribonucleic acid (DNA) synthesis and chromosome replication was studied in a thymine-requiring mutant of Escherichia coli. The rate and extent of chromosome replication were followed by labeling the DNA with isotopic thymine and a density marker, bromouracil. The DNA was extracted and analyzed by CsCl gradient centrifugation. The block in chromosome replication caused by high concentrations of FPA occurred at the same point on the chromosome as that caused by amino acid starvation. In a random culture, DNA in cells treated with FPA replicated only slightly slower than the DNA from cells that were not exposed to the analogue. In cultures which had been previously starved for thymine, however, the DNA from the cells treated with FPA showed a marked decrease in the rate and extent of replication. It was concluded that the E. coli cell is most sensitive to FPA when a new cycle of chromosome replication is being initiated at the beginning of the chromosome.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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