A related group of compounds belonging to the antimycin class of antibiotics was found in culture broth produced by a Streptomyces species. The group includes known antimycins A1, A2, A3 and A4, and new antimycins A7 and A8. These compounds inhibit ATP-citrate lyase with Ki values of 4 to 60 microM against the substrate magnesium citrate. The structures of the new antimycins were determined by spectroscopic analyses.
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Barrow et al. (1997) studied this question.