title: [Nisin inactivation in a culture of the producer Streptococcus lactis strain MGU].
abstract: The intensive biosynthesis of nizin on the glucose-yeast medium is observed during the logarithmic and early lag phases of the staphylococcal growth. The ratio of nizin in the fermentation broth (free nazin) and that bound with the cells depended on pH of the medium. When pH was maintained at 6.6-6.8, the amount of nazin in the cells during and growth logarithmic phase was equal to its amount in the fermentation broth filtrate. During the lag phase marked inactivation of nizin was noted. periodical feeding of casein prevented the nizin inactivation. The preliminary data are indicative of the enzymatic nature of the antibiotic.
mesh_terms: D003470:Culture Media / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D013294:Lactococcus lactis / Q000254:growth & development / Q000378:metabolism*; D009561:Nisin / Q000037:antagonists & inhibitors*; D013997:Time Factors
chemical_list: D003470:Culture Media; D009561:Nisin
vernacular_title: Inaktivatsiia nizina v kul'ture produtsenta Streptococcus lactis shtamm MGU.