Biosynthetic origins of the polycyclic xanthone antibiotic, citreamicin
1991
The biosynthesis of citreamicin 1 has been studied by feeding 13C- and 18O-labelled precursors to Micromonospora citrea cultures. 13C-NMR spectroscopic analysis of the enriched products demonstrated a labelling pattern indicating that the antibiotic is derived from a polyketide which undergoes rearrangement by a mechanism unique for xanthone biosynthesis.
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