百度试题 题目[名词解释] 钠―钾泵(Na+―K+pump) 相关知识点: 试题来源: 解析 又称Na+-K+ATPase,能水解ATP,使a亚基带上磷酸集团或去磷酸化,将Na+泵出细胞,而将K+泵入细胞的膜装运载体蛋白。反馈 收藏
NKA functions to move three sodium ions out of the cells and two potassium ions in. In cardiac myocytes, NKA inhibition causes an accumulation of cytosolic Na+which in turn activates the reverse-mode of Na+/Ca2+-exchanger. This leads to an increase in cytosolic [Ca2+]iwhich perturbs the ...
ATP binding to solubilized (Na+ + K+)-ATPase. The abolition of subunit-subunit interaction and the maximum weight of the nucleotide-binding unit Biochim Biophys Acta, 731 (1983), pp. 282-289 View PDFView articleView in ScopusGoogle Scholar 16 N. Deguchi, P.L. Jørgensen, P.L. Mauns...
It exchanges three Na+ ions out of the cell for two K+ ions into the cell using energy generated from ATP hydrolysis1. The Na+/K+-ATPase activity is important for many cellular functions, such as maintenance of membrane potentials, cellular volume regulation and pH adjustments, and supporting...
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试述Na+-K+泵的作用及生理意义。相关知识点: 试题来源: 解析 本质:钠泵每分解一分子ATP可将3个Na+移出胞外,同时将2个k+移入胞内。 作用:将细胞内多余的Na+移出膜外和将细胞外的K+移入膜内,形成和维持膜内高K+和膜外高Na+的不平衡离子分布。 生理意义:①钠泵活动造成的细胞内高K+为胞质内许多代谢...
机制:在细胞内侧,α亚基与Na+相结合促进ATP水解,α亚基上的一个天冬氨酸残基磷酸化引起α亚基的构象发生变化,将Na+泵出细胞外,同时将细胞外的K+与α亚基的另一个位点结合,使其去磷酸化,α亚基构象再度发生变化将K+泵进细胞,完成整个循环。Na+依赖的磷酸化和K+依赖的去磷酸化引起构象变化有序交替发生。每个循...
A G-quadruplex is identified which can exhibit two different motifs, respectively, corresponding to Na+and K+. The relative amount of each motif is related to the Na+/K+ratio. Based on selective recognition of the G-quadruplex motifs by a cyanine dye aggregate, a method for both colorimetric...
Mg是镁，Ca是钙，Na是钠，K是钾，Pb是铅，Fe是铁，Cr是铬，Al是铝。这些都是元素符号。如果是水质分析中分析的结果，则表示上述离子在水中的含量。其中钙镁是水的硬度的一个指标，铅铬是有毒的或者致癌的，对环境有较大污染的。钠钾铝铁没什么大的危害 ...
et al. ATP1A1-mediated Src signaling inhibits coronavirus entry into host cells. J. Virol. 89, 4434–4448 (2015). Article CAS Google Scholar Kapoor, A. et al. Human cytomegalovirus inhibition by cardiac glycosides: evidence for involvement of the HERG gene. Antimicrob. Agents Chemother. 56...