为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

Gene deletion vector pXL05(pKC1139∷△olmA1 +△olmA4) was used to disrupt oligomycin PKS encoding genes (olmA) in Strept......

Among eight components of avermectin, B1 fractions have the most effective antiparasitic activities and the lowest level......

在Streptomyces avermitilis的菌种选育过程中得到一系列的突变株,用HPLC分析其次级代谢产物,发现菌株E107不再产生avermectin,而......

aveR是阿维链霉菌NRRL 8165阿维菌素生物合成基因簇中唯一可能的调节基因．为了验证aveR是否参与阿维菌素生物合成基因的转录调节，构......