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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Synthesis of N4-substituted CTP by mammalian CTP synthetase.

Highly purified CTP synthetase from Ehrlich ascites tumor cells catalyzes the formation of N4-substituted CTP from UTP and hydroxylamine and its derivatives. The products with hydroxylamine and O-methylhydroxylamine were identified as N4-hydroxyCTP and N4-methoxyCTP by absorption spectra and chromatographic behavior on Dowex column, respectively. The weak nucleophilic amines such as methylamine, ethylamine or diethylamine and a less nucleophilic amine, sulfamic acid, did not react with UTP. These results suggest that the nucleophilicity and basicity of amines are important in the enzymic reaction with UTP.[1]

References

  1. Synthesis of N4-substituted CTP by mammalian CTP synthetase. Kizaki, H., Ohsaka, F., Sakurada, T. Biochem. Biophys. Res. Commun. (1987) [Pubmed]
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