[Effect of the phosphorus concentration on novobiocin formation by the producer Act. spheroides].

According to the literature data biosynthesis of novobiocin by Act. spheroides unlike other antibiotics does not practically depend on the phosphorus levels in the medium. In the present paper it is shown that production of novobiocin in natural media is sensitive to the concentration of mineral phosphorus in the medium. The optimal concentration of phosphorus for biosynthesis of novobiocin is almost within the same ranges as that for biosynthesis of streptomycin, tetracyclines and oleandomycin.