利用豌豆根瘤菌（Ｒｈｉｚｏｂｉｕｍｌｅｇｕｍｉｎｏｓａｒｕｍ）ＤＮＡ和好气性固氮菌（Ａｚｏｔｏｂａｃｔｅｒｖｉｎｅｌａｎｄｉｉ）ＤＮＡ之间的同源性，将ｎｉｆＤ基因插入了Ｔｎ５的豌豆根瘤菌突变株来诱导在ｎｉｆＤ基因上产生变异的Ａ．ｖｉｎｅｌａｎｄｉｉ突变株．先将豌豆根瘤菌的固氮......

It is reported that fermentative liquids with various concentrations of La and Nd affect the fer-mentation of alginic ac......

从Azotobacter vinelandii中通过PCR扩增了5'和3'端分别缺失264bp和261bp的nifS'片段,克隆至载体pUC18,形成重组质粒p......