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MX-305 Centrifuge

TOMY MX-Series -The Height of Performance and Convenience

Company: TOMY SEIKO
Catalog#: MX-305
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Bacterial Intracellular Sodium Ion Measurement using CoroNa Green
Author:
Date:
2017-01-05
[Abstract]  The bacterial flagellar type III export apparatus consists of a cytoplasmic ATPase complex and a transmembrane export gate complex, which are powered by ATP and proton motive force (PMF) across the cytoplasmic membrane, respectively, and transports flagellar component proteins from the cytoplasm to the distal end of the growing flagellar structure where their assembly occurs (Minamino, 2014). The export gate complex can utilize sodium motive force in addition to PMF when the cytoplasmic ATPase complex does not work properly. A transmembrane export gate protein FlhA acts as a dual ion channel to conduct both H+ and Na+ (Minamino et al., 2016). Here, we describe how to measure the intracellular Na+ concentrations in living Escherichia coli ... [摘要]  细菌鞭毛III型出口设备由细胞质ATP酶复合物和跨膜出口门复合物组成,分别由ATP和质子动力(PMF)驱动跨越细胞质膜,并将鞭毛成分蛋白从细胞质转运到远端结束它们的组装发生的鞭毛结构(Minamino,2014)。当细胞质ATPase复合物不能正常工作时,出口门复合物可以利用除PMF之外的钠动力。跨膜出口门蛋白FlhA充当双离子通道,以进行H + 和Na + (Minamino等人,2016)。在这里,我们描述如何使用钠敏感荧光染料CoroNa Green(Minamino等人)测量活细胞大肠杆菌细胞中的细胞内Na+浓度,。,2016)。通过荧光显微镜检测CoroNa Green的荧光强度,可以定量测定细胞内Na +的浓度。

背景 通过荧光成像技术测量细胞内Na +浓度能够在单细胞水平上更精确和定量地进行,因为每个细胞的背景噪声可以通过图像分析程序去除。 Lo <等等。已经建立了用于测量活体中的细胞质Na +浓度的方案。使用钠敏感荧光染料钠绿,并显示细胞质Na +浓度维持在10mM左右。大肠杆菌在0至100mM的外部Na +浓度范围的宽范围内(Lo et al。,2006)。因为CoroNa ...

Measurements of Free-swimming Speed of Motile Salmonella Cells in Liquid Media
Author:
Date:
2017-01-05
[Abstract]  Bacteria such as Escherichia coli and Salmonella enterica swim in liquid media using the bacterial flagella. The flagellum consists of the basal body (rotary motor), the hook (universal joint) and the filament (helical screw). Since mutants with a defect in flagellar assembly and function cannot swim smoothly, motility assay is an easy way to characterize flagellar mutants. Here, we describe how to measure free-swimming speeds of Salmonella motile cells in liquid media. Free-swimming behavior under a microscope shows a significant variation among bacterial cells. [摘要]  细菌如大肠杆菌和肠炎沙门氏菌在液体培养基中使用细菌鞭毛游泳。鞭毛由基体(旋转马达),钩(万向接头)和丝(螺旋螺钉)组成。由于鞭毛组装和功能缺陷的突变体不能顺利游动,所以运动测定是描绘鞭毛突变体的简单方法。在这里,我们描述如何测量液体介质中沙门氏菌活力细胞的游泳速度。显微镜下的游泳行为显示出细菌细胞之间的显着变化。

背景 fl ar。。。大肠杆菌和沙门氏菌由跨越细胞质膜的质子动力(PMF)的下坡质子易位(Morimoto和Minamino,2014; Minamino和Imada,2015)提供动力。质子驱动的鞭毛马达的旋转速度与总PMF成比例(Gabel和Berg,2003)。因此,运动细胞的游泳速度的测量使得我们不仅可以分析各种突变体的运动性能,还可以检查在实验条件下总PMF是否存在显着差异(Minamino等人)。 ,2016)。

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