塊菌素 的英文怎麼說
中文拼音 [kuāijūnsù]
塊菌素
英文
tubercidin-
In consideration of the colinearity between the activities of avermectin pks domains and structure of the polyketide product, the dh2 domain of avermectin pks, which corresponds to c - 22, 23 dehydration, appears to have partial dehydratase activity and this results in a mixture of c - 22, 23 double bonds ( " 1 " components ) and c23 hydroxy compounds ( " 2 " components )
目前國內外尚未見有關僅產阿維菌素b1菌株的報道。根據阿維菌素pks基因結構與其聚酮合成反應步驟之間的線性關系，推測b2組分的產生可能是由於阿維菌素pks模塊2中脫水酶（ dh ）的不完全活性所造成。In this study, we attempted to construct an engineering strain producing only avermectin bl through the replacement of dna encoding dh2 - kr2 domains of the avermectin pks ( avedh2 - kr2 ) with dna encoding dh2 - kr2 domains from the pikromycin pks in s. avermitilis olm73 - 12, producing only avermectins b and no oligomycin. gene replacement vector pxl201 ( pkc1139 : : 5 ' flank + pia : dh2 - kr2 + 3 ' flank ) was used to transform 5. avermitilis olm73 - 12 protoplasts
我們以不產寡黴素而僅產阿維菌素b的工程菌olm73 - 12為出發菌株，用委內瑞拉鏈黴菌（ streptomycesvenezuelae ）中編碼pikromycinpks模塊2上完全活性的dh和酮基還原酶（ kr ）的dna區域對olm73 - 12染色體上編碼阿維菌素pks模塊2中dh和kr的區域進行取代，試圖構建僅產b1組分的基因工程菌。Oral bacteria could also harm blood essels or cause blood clots by releasing toxins that resemble proteins found in artery walls or the bloodstream
口腔內的細菌也能夠通過釋放與動脈壁或血流中發現的蛋白相似的毒素而危及血管或引起血凝塊。
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