
- SEA0400
KB-R7943 mesylateInhibitor of the reverse mode of the Na+/Ca2+ exchanger |
Sample solution is provided at 25 µL, 10mM.
































Quality Control & MSDS
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- Purity = 98.75%
- COA (Certificate Of Analysis)
- HPLC (Retest)
- NMR (Nuclear Magnetic Resonance)
- MSDS (Material Safety Data Sheet)
- Datasheet
Chemical structure


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Cas No. | 182004-65-5 | SDF | Download SDF |
Synonyms | KB-R7943; KB-R 7943 | ||
Chemical Name | methanesulfonic acid;2-[4-[(4-nitrophenyl)methoxy]phenyl]ethyl carbamimidothioate | ||
Canonical SMILES | CS(=O)(=O)O.C1=CC(=CC=C1CCSC(=N)N)OCC2=CC=C(C=C2)[N+](=O)[O-] | ||
Formula | C17H21N3O6S2 | M.Wt | 427.5 |
Solubility | ≥42.8 mg/mL in DMSO, ≥4.61 mg/mL in EtOH with ultrasonic and warming, <2.43 mg/ml="" in="" h2o="">2.43> | Storage | Store at -20°C |
Shipping Condition | Evaluation sample solution : ship with blue ice.All other available size:ship with RT , or blue ice upon request | ||
General tips | For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months. |
KB-R7943 mesylate is a potent and selective inhibitor of Na+/Ca2+ exchanger (NCE) with IC50 value of 0.7 μM.NCE is an antiporter membrane protein that exchanges 3 Na+ for 1 Ca2+ and can function to cause Ca2+ accumulation (reverse mode) or Ca2+ extrusion (forward mode) depending on the concentrations of each ion on either side of the membrane and on the membrane potential [1].In transfected Chinese hamster ovary (CHO) cells expressing NCE, KB-R7943 (10 μM) inhibited NCX activity at high (140mM) but not at low (10mM) cytosolic Na+ concentrations [2]. In cultured rat forebrain neurons loaded with glutamate- (3 μM), N-methyl-D-aspartate- (30 μM), kainate- (100 μM) or KCl- (50 mM) induced [Ca2+] transients, KBR7943 inhibited these transients with IC50 values of 6.6, 8.2, 5.2 and 2.9 μM, respectively. While, KB-R7943 didn’t inhibit glutamate-induced neuronal injury [1]. In mice with ischemic acute renal failure (ARF), KB-R7943 significantly decreased endothelin-1 (ET-1) in the kidney and relieved the ARF-induced renal dysfunction [3].References: [1]. Hoyt KR, Arden SR, Aizenman E, et al. Reverse Na+/Ca2+ exchange contributes to glutamate-induced intracellular Ca2+ concentration increases in cultured rat forebrain neurons. Mol Pharmacol, 1998, 53(4): 742-749.[2]. Condrescu M, Reeves JP. Inhibition of sodium-calcium exchange by KB-R7943: Dodecylamine and sphingosine in transfected Chinese hamster ovary cells. Cell Calcium, 2010, 47(5): 404-411. [3]. Yamashita J, Ogata M, Takaoka M, et al. KB-R7943, a selective Na+/Ca2+ exchange inhibitor, protects against ischemic acute renal failure in mice by inhibiting renal endothelin-1 overproduction. J Cardiovasc Pharmacol, 2001, 37(3): 271-279.
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求有经验的大神指教,我的载体和目的基因连不上,转化不到大肠中,比例为1:3。另外,为啥胶回收后的载体浓度那么低,大约6ng/ul了,影响连接么?
连接酶通常是包括“连接酶”这个字,就如DNA连接酶是将脱氧核糖核酸(DNA)片段连接。其他普遍的名称包括“合成酶”,因为这些酶是用作合成新的分子,或当它们是将二氧化碳加入一个分子时则称为“羧化酶”。
菌体构建时,目的基因连接在T载体上,测序也正确,但是将目的基因还有载体分别双酶切后总是连接不上,将连接后产物跑核酸胶,什么也没有,不知道是什么原因?我的目的基因浓度为9ng/ul,载体回收后的浓度为6ng/ul,是因为浓度太低的原因吗?还有就是连接有目的基因的T载体双酶切后出现了三条带,这个又是什么原因呢?希望得到解答
DNA连接酶主要是连接DNA片段之间的磷酸二酯键最初从原核生物(大肠杆菌)分离得到的.现在生物基因工程主要是从T4噬菌体中分离得到的,
大家有用过Invitrogen的T4连接酶吗?说明书上是23-26度连接,一般的连接酶不都是16度吗?应该用多少度呢?另外,说明书上还说连接后为了达到更好的转化效率,应将连接反应液至少稀释5倍再转化,是这样吗?谢谢大家帮忙啊
DNA连接酶:可以连接被限制酶切割开磷酸二酯键
产生这一现象的原因在于 DNA合成酶只能沿5'-3'的方向合成DNA 而DNA本身的两条链又是反向分布的 所以就造成了只有一条链合成可以连续地进行下去(以它为模板的子链生成方向正好是DNA聚合酶可以直接提供的) 而后随链要盘绕成回环 反扭过来 才能合成
再合成起始的时候 DNA聚合酶是需要一段RNA引物的 在原核生物中这一引物是由dnaQ(一种酶)在已解旋的单链5'端合成,真核生物中也有对应的酶 由于后随链的合成不连续 所以每个片段都要有引物 在DNA合成结束的时候 这些引物要被切除 因而留下缺口 这时又要特定的酶去填补缺口(比如 大肠杆菌中的DNA聚合酶I)可是填补序列和周围序列间会有缺刻 也就是说他们交界处的3'-5'磷酸二脂键是断开的 这时需要DNA连接酶发挥作用 将其连好
所以 后随链上的缺刻多 还真够DNA连接酶忙一阵的 前导链上只有一开始有RNA引物 因此 最后也基本只有这个地方会用到连接酶

