Abstract
All known living cells contain thymine in their DNA, but it is not clear why uracil, which base pairs adenine as does thymine, would not suffice. A considerable expenditure of energy is required to synthesize dTTP from dUTP, and the pathway shown in Fig. 1 suggests that dUTP is an obligate precursor of dTTP in wild type Escherichia coli, and probably most other organisms. An alternate route could be the salvage of thymine or thymidine, but it is not known how much dTTP is synthesized by this pathway in various organisms. In wild type E.coli probably very little, if any, dTTP is synthesized in this manner (1).
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© 1978 Plenum Press, New York
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Warner, H.R., Duncan, B.K. (1978). In Vivo Synthesis and Properties of Uracil-Containing DNA. In: Molineux, I., Kohiyama, M. (eds) DNA Synthesis. NATO Advanced Study Institutes Series, vol 17. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-0844-7_19
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DOI: https://doi.org/10.1007/978-1-4684-0844-7_19
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