Three strains of soil Streptomyces which belong to Streptomyces cacaoi were found to produce a new antifungal antibiotic complex, polyoxin complex. Polyoxin A and B were isolated in pure forms out of it. They are amphoteric compounds with the molecular formulas, C23H32N6O14 and C17H25N5O13 respectively. They showed very specific activities against phytopathogenic fungi.
Japan Society for Bioscience, Biotechnology, and Agrochemistry