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In vitro assays of CmmA using different acyl‐CoA donors. Analysis by HPLC of reaction products using membrane fraction, 4A,4E‐O‐dideacetyl‐chromomycin A33, and (A) isobutyryl‐CoA or (B) propionyl‐CoA as acyl‐CoA donor substrates. 4A,4E‐O‐dideacetyl‐chromomycin A3 derivatives with one (★) or two (
) acyl groups.
