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  • Title: Berninamycins B, C, and D, minor metabolites from Streptomyces bernensis.
    Author: Lau RC, Rinehart KL.
    Journal: J Antibiot (Tokyo); 1994 Dec; 47(12):1466-72. PubMed ID: 7844041.
    Abstract:
    Berninamycins B, C, and D were isolated from fermentation of Streptomyces bernensis and their structures were studied with 13C NMR and FAB mass spectrometry. Berninamycin B has a valine unit in its cyclic peptide loop instead of the beta-hydroxyvaline unit found in berninamycin A. Berninamycin D has two fewer dehydroalanine units attached to the carboxyl carbon of the pyridine ring. Based on FAB-MS results, berninamycin C is postulated to have only one dehydroalanine unit attached to the carboxyl carbon of pyridine. The biogenesis of berninamycins B, C, and D is discussed.
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