大肠杆菌K-12的钾依赖性突变体
Potassium-dependant mutants of Escherichia coli K-12.
作者信息
Epstein W, Davies M
出版信息
J Bacteriol. 1970 Mar;101(3):836-43. doi: 10.1128/jb.101.3.836-843.1970.
Abstract
Mutants of Escherichia coli K-12 that grow more slowly in media containing low concentrations of K have been isolated. All independent mutants of this type which have been studied carry a mutation in a small region of the bacterial chromosome between the supE and gal loci. The growth rate of the mutants is the same as that of the parental strains in medium containing more than 1 mm K, but is only 50% that of the parent when the K concentration is reduced to 0.1 mm. The mutants do not appear to have a primary alteration in K transport, and are therefore referred to as K-dependent. The abbreviation kdp is proposed for this class of mutant.
摘要
已分离出在含有低浓度钾的培养基中生长较慢的大肠杆菌K-12突变体。所有已研究的这类独立突变体在细菌染色体上位于supE和gal基因座之间的一个小区域携带一个突变。在含有超过1 mM钾的培养基中，突变体的生长速率与亲本菌株相同，但当钾浓度降至0.1 mM时，其生长速率仅为亲本的50%。这些突变体似乎在钾转运方面没有原发性改变，因此被称为钾依赖性突变体。建议用缩写kdp来表示这类突变体。
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