the gene of streptomyces avermitilis commander of avermectin b2: b1.

摘要

the invention relates to molecules containing nucleotide sequences encoding polynucleotidiques gene with a product.in order to change the quantity of avermectins or 2: 1 produced by culture of s. avermitilis by fermentation. it is, in addition, vectors, host cells, and the mutant strains.avermitilis in which the gene has been inactivated, or transferred to, or to change the quantity of categories of avermectins produced: 1.application: production of avermectins and commercially more attractive.