The biosynthesis of coloradocin involves assembly of a polyketide chai
n similar to those of nargenicin and nodusmicin and an apparent non-po
lyketide eleven carbon unit which incorporates acetate and succinate (
but not propionate) by some undetermined pathway. Precursor incorporat
ion was studied using single and double labeled C-13 precursors and la
bel scrambling was suppressed by the simultaneous addition of other un
labeled substrates. Copyright (C) 1996 Elsevier Science Ltd