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发面要放盐吗
更新时间: 2020-11-01 00:00:00  

发面要放盐,发酵面团加入适量的盐,占面粉0.1%-0.2%-0.3%,可以促进酵母的繁殖,提高发酵速度,并能使面筋增强,加点盐,防止面团失去一定的活性。

酵母(saccharomyce)是基因克隆实验中常用的真核生物受体细胞,培养酵母菌和培养大肠杆菌一样方便。酵母克隆载体的种类也很多。酵母菌也有质粒存在,这种2μm长的质粒称为2μm质粒,约6300bp。这种质粒至少有一段时间存在于细胞核内染色体以外,利用2μm质粒和大肠杆菌中的质粒可以构建成能穿梭于细菌与酵母菌细胞之间的穿梭质粒。酵母克隆载体都是在这个基础上构建的。

关键词: 发面

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