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首页> 外文期刊>Microbiology >A Strain of Lactobacillus bifldus which requires Strepogenin
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A Strain of Lactobacillus bifldus which requires Strepogenin

机译：一种乳酸杆菌菌株，需要strexogenin

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SUMMARY: A strain of Lactobacillus bifidus was isolated from the faeces of a breastfed infant and subcultivated in the minimal medium of Hassinen, Durbin, Tomarelli&Bernhart (1951). The cysteine requirement for maximal growth of the strain was c. 100 μg. cysteine/ml. Human and cow milk were found to contain another factor, besides cysteine, which was essential for optimal growth. The active material in milk could be replaced by enzymic hydrolysates of some commercial proteins; egg albumin, and blood albumin were the most potent sources. The active material was heat stable, but was completely inactivated by treatment with strong acid. All the properties of this active material studied showed a close resemblance to those of strepogenin.
机译：发明内容：从母乳喂养婴儿的粪便中分离出一种乳杆菌菌株，并在哈斯因，德宾，Tomarelli＆Bernhart（1951年）的最小培养基中延长。菌株最大生长的半胱氨酸要求是c。 100μg。半胱氨酸/ ml。除了半胱氨酸之外，发现人和牛奶含有另一个因素，这对于最佳生长至关重要。乳中的活性材料可以通过一些商业蛋白质的酶水解产物代替;蛋白翻膜和血白蛋白是最有效的来源。活性物质热稳定，但通过用强酸处理完全灭活。研究的所有属性都表现出与strexogenin那些的相似之处。

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