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公司名称: Hoefer
产品编号: FH225V
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Determination of the Cellular Ion Concentration in Saccharomyces cerevisiae Using ICP-AES
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Date:
2020-08-20
[Abstract]  The yeast Saccharomyces cerevisiae has been perceived over decades as a highly valuable model organism for the investigation of ion homeostasis. Indeed, many of the genes and biological systems that function in yeast ion homeostasis are conserved throughout unicellular eukaryotes to humans. In this context, measurement of the yeast cellular ionic content provides information regarding yeast response to gene deletion or exposure to chemicals for instance. We propose here a protocol that we tested for the analysis of 12 elements (Ba2+, Ca2+, Cd2+, Co2+ ... [摘要]  [摘要] 酵母酿酒酵母已被感知了几十年,作为离子稳态的调查一个非常有价值的模型生物。实际上,在整个酵母的单细胞真核生物中,在酵母离子稳态中起作用的许多基因和生物系统都是保守的。在这种情况下,酵母细胞离子含量的测量提供了有关酵母对例如基因缺失或暴露于化学物质的反应的信息。我们在这里提出一种测试过的协议,用于分析12种元素(Ba 2 + ,Ca 2 + ,Cd 2 + ,Co 2 + ,Cu 2 + ,Fe 2 + ,K 2 + ,Mg 电感耦合等离子体原子发射光谱法(ICP-AES)测定酵母中的2 + ,Mn 2 + ,Na + ,Ni 2 + ,Zn 2+ )。这项技术能够确定一个生物样品中许多离子的细胞含量。

[背景 ] 酵母已被广泛用于研究基因缺失,细胞外环境的修改,或异源蛋白的生产,例如后的离子响应。在这种情况下,具有监测酵母细胞离子状态的方法是非常重要的。ICP-AES使用来自惰性气体(如氩气)的高能等离子体非常快速地燃烧分析物。从分析物发出的颜色表示存在的元素,光谱信号的强度表示这些元素的浓度。与其他技术(例如分光光度法,原子吸收光谱法和原子荧光光谱法)相比,ICP-AES是一种多离子分析方法,涉及简单且快速的过程,且检测限相对较低(Dahlquist和Knoll,1978年)。此处描述的方法适用于Ba 2 + ,Ca 2 + ,Cd 2 + ...

Amino Acid Transport Assays in Resting Cells of Lactococcus lactis
Author:
Date:
2013-06-20
[Abstract]  Many bacteria are auxotrophic for at least a number of amino acids for which they lack the biosynthetic pathways. The organisms are still able to grow in media containing free amino acids as the sole source of amino acid when transport systems for the free amino acids are present in the cytoplasmic membrane. A range of transport systems for essential as well as non-essential amino acids has been described that use the proton motive force (by proton symport) or ATP hydrolysis as driving force to allow for the accumulation of the amino acid in the cells. The most widely used assay for uptake of ... [摘要]  许多细菌是至少一些氨基酸的营养缺陷型,它们缺少生物合成途径。 当游离氨基酸的运输系统存在于细胞质膜中时,生物体仍然能够在含有游离氨基酸作为唯一氨基酸来源的培养基中生长。 已经描述了使用质子动力(通过质子对数)或ATP水解作为驱动力以允许氨基酸在细胞中积累的必需氨基酸和非必需氨基酸的一系列运输系统。 用于摄取氨基酸(或任何其它底物)的最广泛使用的测定法是使用放射性标记底物的快速过滤测定法。 在这里,我们描述了由葡萄糖激发的乳酸乳球菌(乳酸乳球菌)的静息细胞中摄取的测定。

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