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[Lethal and mutagenic effect of incorporated 6-3H-pyrimidines on extracellular phage lambda]. 1989

L V Konevega, and V L Kalinin

A study was made of lethal and mutagenic effects of 6-3H-thymidine and 6-3H-cytosine, incorporated into DNA, on extracellular phage lambda. The lethal effects of both 6-3H-pyrimidines (the number of lethal hits per 3H decay) do not differ from those of [3H-methyl]thymidine and 5-3H-cytosine. The mutagenic effects (at equal survival rates) are as follows: 6-3H-thymidine approximately 3H2O less than [3H-methyl]thymidine less than 6-3H-cytosine less than 5-3H-cytosine. UV-irradiation of host cells induces a more pronounced W-mutagenesis with 6-3H-cytosine than with 6-3H-thymidine.

UI MeSH Term Description Entries
D009154 Mutation Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations. Mutations
D010582 Bacteriophage lambda A temperate inducible phage and type species of the genus lambda-like viruses, in the family SIPHOVIRIDAE. Its natural host is E. coli K12. Its VIRION contains linear double-stranded DNA with single-stranded 12-base 5' sticky ends. The DNA circularizes on infection. Coliphage lambda,Enterobacteria phage lambda,Phage lambda,lambda Phage
D003596 Cytosine A pyrimidine base that is a fundamental unit of nucleic acids.
D004279 DNA, Viral Deoxyribonucleic acid that makes up the genetic material of viruses. Viral DNA
D013936 Thymidine A nucleoside in which THYMINE is linked to DEOXYRIBOSE. 2'-Deoxythymidine,Deoxythymidine,2' Deoxythymidine
D014316 Tritium The radioactive isotope of hydrogen also known as hydrogen-3. It contains two NEUTRONS and one PROTON in its nucleus and decays to produce low energy BETA PARTICLES. Hydrogen-3,Hydrogen 3

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