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

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Biosynthesis of a 7-alpha-methoxycephalosporin. Incorporation of molecular oxygen.

A 7-alpha-methoxycephalosporin containing a carbamoyloxymethyl substituent at C-3 (cephamycin C) has been isolated from the extracellular fluid of an aqueous suspension of Streptomyces clavuligerus shaken in the presence of 18O2. The cephalosporin has been converted into its N-acetyl dimethyl ester and the distribution of 18O in the latter determined by chemical-ionization mass spectrometry. The results indicate that the oxygen atom of the methoxy group, as well as that linked to the exocyclic methylene group at C-3, is derived from molecular O2.[1]

References

  1. Biosynthesis of a 7-alpha-methoxycephalosporin. Incorporation of molecular oxygen. O'Sullivan, J., Aplin, R.T., Stevens, C.M., Abraham, E.P. Biochem. J. (1979) [Pubmed]
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