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. 1974 Jan;13(1):140–145. doi: 10.1128/jvi.13.1.140-145.1974

Virus Type-Specific Thymidine Kinase in Cells Biochemically Transformed by Herpes Simplex Virus Types 1 and 2

D B Davis 1, W Munyon 1, R Buchsbaum 1, R Chawda 1
PMCID: PMC355268  PMID: 4359421

Abstract

Transformation of mouse cells (Ltk−) and human cells (HeLa Bu) from a thymidine kinase (TK)-minus to a TK+ phenotype (herpes simplex virus [HSV]-transformed cells) has been induced by infection with ultraviolet-irradiated HSV type 2 (HSV-2), as well as by HSV type 1 (HSV-1). Medium containing methotrexate, thymidine, adenine, guanosine, and glycine was used to select for cells able to utilize exogenous thymidine. We have determined the kinetics of thermal inactivation of TK from cells lytically infected with HSV-1 or HSV-2 and from HSV-1- and HSV-2-transformed cells. Three hours of incubation at 41 C produces a 20-fold decrease in the TK activity of cell extracts from HSV-2-transformed cells and Ltk− cells lytically infected with HSV-2. The same conditions produce only a twofold decrease in the TK activities from HSV-1-transformed cells and cells lytically infected with HSV-1. This finding supports the hypothesis that an HSV structural gene coding for TK has been incorporated in the HSV-transformed cells.

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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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