殺酵菌素 的英文怎麼說
中文拼音 [shājiàojūnsù]
殺酵菌素
英文
fermicidin-
Israelensis recombinants, which contained recombinants plasmid pmt4 and pmt9 respectively, were obtained by electroporation. the bioassay results showed that the recombinants b - pmt9 and b - pmt4 had toxicities both to resistant and susceptible c. quinqnefasciatus larvae during vegetative growth stage, having the lc ? o values similar to that of. fi. sssii - 1. however, the toxic levels of the final sporulated cultures of recombinants b - pmt4 and b - pmt9 differed, with a lcso value of 2 49mg / ml for b - pmt9 and little toxicity for b - pmt4 by using the plasmid pmt9, m txl gene from b. sphaericus was ligated with p20 and cytjaa gene, giving recombinant plasmid pmpx2
含有pmt9和pmt4的大腸桿菌轉化子能表達產生mtx1毒素，發酵液對敏感和抗性致倦庫蚊幼蟲具有中度毒殺作用；含有pmt9和pmt4的蘇雲金芽孢桿菌轉化子b - pmt9和b - pmt4在營養體生長階段對敏感蚊幼和抗性幼蟲也具有毒性，毒力與野生型b . sss - 1相當，而不同轉化子在芽孢形成期的毒力因插入的mtx1基因轉錄方向不同而表現出差異，其中b - pmt4對目標蚊幼毒力極低（ lc _ （ 50 ） 10mg ml ） ，而b - pmt9對蚊幼蟲具有毒性（ lc _ （ 50 ） = 2 . 49mg ml ） 。The deletion mutants were proved to be genetically stable, and thus might be promising strains in industrial production of avermectins b. although s. avermitilis produces eight related components of avermectins, only two components, bla and bib, are available for the medical, veterinary and agricultural fields
該缺失突變是在染色體上通過同源雙交換完成的，不會發生進一步的重組，因此突變株性狀穩定，在工業生產上具有應用價值。阿維菌素的天然發酵產物共有八個組分，其中只有b1組分的殺蟲活性最高，被作為殺蟲劑在農業和畜牧業中使用。
分享友人