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CH3COONH4

乙酸铵

公司名称: Wako Pure Chemical Industries
产品编号: 019-02835
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Fluorescence Measurement and Calibration of Intracellular pH in Starfish Oocytes
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Date:
2020-10-05
[Abstract]  Oocyte maturation is a process wherein an oocyte arrested at prophase of meiosis I resumes meiosis to become a fertilizable egg. In starfish ovaries, a hormone released from follicle cells activates the oocytes, resulting in an increase in their intracellular pH (pHi), which is required for spindle assembly. Herein, we describe a protocol for pHi measurement in living oocytes microinjected with the pH-sensitive dye BCECF. For in vivo BCECF calibration, we treated oocytes with artificial seawater containing CH3COONH4 to clamp pHi, ... [摘要]  [摘要]卵母细胞成熟是在减数分裂I前期停滞的卵母细胞恢复减数分裂成为可受精卵的过程。在海星卵巢中,从卵泡细胞释放的激素激活卵母细胞,导致其胞内pH(pH i )升高,这是纺锤体组装所必需的。在本文中,我们描述了在用pH敏感染料BCECF显微注射的活卵母细胞中测量pH i的方案。对于在体内BCECF校准,我们用含有CH人造海水的卵母细胞3 COONH 4到夹具的pH我 ,注入pH标准溶液,并将BCECF荧光强度比值转换为pH i值。值得注意的是,如果实际pH值我比注入标准溶液的pH值已知更高或更低时,BCECF的荧光强度比将分别减小或增大。另一方面,注入溶液的pH值没有显示出荧光强度的变化,应该认为是实际pH值i 。这些用于pH i校准和钳制的方法简单且可重现。

关键词:细胞内pH,BCECF ,卵母细胞,显微注射,海星,标定



[背景]细胞内pH (pH为我)测量为细胞生物学的研究中是非常有用的方法,因为pH值我起着在多种细胞过程中起重要作用,如配子活化(约翰逊和EPEL ,1976; Shen和斯坦哈特,1978 ;蒂尔尼等,1978 ),细胞分裂(Schuldiner和Rozengurt ,1982; Moolenaar译者等,1983;阿南德和普拉萨德,1989; ...

Purification of 70S Ribosomes from Bacillus subtilis
Author:
Date:
2015-04-05
[Abstract]  The eubacterial ribosome (70S) is a macromolecular complex that is composed of a small (30S) subunit and a large (50S) subunit. The small subunit comprises the 16S ribosomal RNA (rRNA) and more than 20 ribosomal proteins (r-proteins), whereas the large subunit comprises the 23S and 5S rRNAs and more than 30 r-proteins. Bacillus subtilis (B. subtilis) has 57 r-ribosomal protein genes and three rRNAs (16S, 23S and 5S rRNAs). Among them, we identified 21 r-proteins of the small subunit and 31 r-proteins of the large subunit in B. subtilis (Nanamiya et al., ... [摘要]  真细菌核糖体(70S)是由小(30S)亚基和大(50S)亚基组成的大分子复合物。 小亚基包含16S核糖体RNA(rRNA)和超过20个核糖体蛋白(r-蛋白),而大亚基包含23S和5S rRNA和超过30个r蛋白。 枯草芽孢杆菌(<枯草芽孢杆菌)具有57个核糖体蛋白基因和三个rrna(16s,23s和5s rrna)。 其中,我们确定21 r蛋白的小亚基和31 r蛋白的大亚基在b。 枯草芽孢杆菌(nanamiya等人,2004)。 核糖体的各个组分的功能和作用尚未完全澄清。 在本文中,我们详细描述了从b的指数生长细胞制备70s核糖体的基于超速离心的方案。 枯草芽孢杆菌。 rrna)。="" 其中,我们确定21="" r蛋白的小亚基和31="" r蛋白的大亚基在b。="" 枯草芽孢杆菌(nanamiya等人,2004)。="" 核糖体的各个组分的功能和作用尚未完全澄清。="" 在本文中,我们详细描述了从b的指数生长细胞制备70s核糖体的基于超速离心的方案。="" 枯草芽孢杆菌。=""> ...

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