Abstract
The effects of the glucose concentration in the medium and O-methyl-L-threonine resistance on the ratio of components of the avermectin complex produced by Streptomyces avermitilishave been studied. Glucose deficiency increases the ratio of components A and ain the complex, while decreasing that of components 1. A mutation that renders the microorganisms resistant to O-methyl-L-threonine (an analogue of isoleucine) increases the ratio of components a in the complex, while decreasing that of components 1. The distribution of aand b in fractions 1and 2 remains constant: the values of the ratio a/b in the fractions amount, respectively, to 1 : 1 and 2 : 1. The relation of the variations in the composition of the avermectin complex to changes in the carbohydrate metabolism of the producer stain, underlain by availability of the source of carbon, is discussed.
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Mironov, V.A., Sergeeva, A.V., Gavrilina, A.V. et al. Dependence of the Composition of the Avermectin Complex of Streptomyces avermitilis on the Glucose Content in the Medium. Applied Biochemistry and Microbiology 39, 183–187 (2003). https://doi.org/10.1023/A:1022594114690
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DOI: https://doi.org/10.1023/A:1022594114690