Letiagin, K P [Variability in Act. circulatus var. monomycini induced by N-5-nitroso-N-methylbiuret]. [electronic resource] - Antibiotiki Jun 1975 - 488-94 p. digital Publication Type: English Abstract; Journal Article ISSN: 0003-5637 Subjects--Topical Terms: Biuret--analogs & derivativesErythromycin Ethylsuccinate--biosynthesisGenetic Variation--drug effectsMutation--drug effectsNitroso Compounds--pharmacologyPyridoxine--antagonists & inhibitorsStreptomycetaceae--drug effectsTemperatureTime FactorsUrea--analogs & derivatives