title: [Study of the effect of protoplast formation on the antibiotic activity of erythromycin producers].
abstract: The influence of protoplasting and regeneration on the strains of the erythromycin-producing organism differing by their origin was studied with respect to changes in the antibiotic production property. 223 regenerates of the erythromycin-producing culture were tested in several generations and it was shown that there was a marked change in the range of the variation by that property. 40 to 70 per cent of the variants in the IInd generation increased their levels of erythromycin biosynthesis by 20 to 60 per cent as compared to the intact cultures. However, in the subcultures the antibiotic production level decreased and by the IVth generation only 3 to 6 per cent of the variants preserved its increase by 10 to 20 per cent over the control level because of the culture high instability.
authors.forename: G M
authors.initials: GM
authors.lastname: Zakharova
authors.forename: T S
authors.initials: TS
authors.lastname: Belova
authors.forename: V N
authors.initials: VN
authors.lastname: Danilenko
mesh_terms: D015169:Colony Count, Microbial; D003470:Culture Media; D004917:Erythromycin / Q000096:biosynthesis*; D066298:In Vitro Techniques; D011523:Protoplasts / Q000166:cytology*; D013302:Streptomyces / Q000166:cytology* / Q000254:growth & development / Q000378:metabolism
chemical_list: D003470:Culture Media; D004917:Erythromycin
vernacular_title: Izuchenie vliianiia protoplastirovaniia na antibioticheskuiu aktivnost' produtsenta éritromitsina.