
nor-NOHA (acetate)potent, reversible inhibitor of rat liver arginase |
Sample solution is provided at 25 µL, 10mM.
































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- Purity ≥ 97.00%
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Chemical structure


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Cas No. | 1140844-63-8 | SDF | Download SDF |
Synonyms | Nω-hydroxy-nor-Arginine | ||
Chemical Name | 2S-amino-4-[[(hydroxyamino)iminomethyl]amino]-butanoic acid, diacetate | ||
Canonical SMILES | N/C(N([H])CC[C@H](N)C(O)=O)=NO.CC(O)=O.CC(O)=O | ||
Formula | C5H12N4O3 • 2C2H4O2 | M.Wt | 296.3 |
Solubility | ≤5mg/ml in DMSO;1mg/ml in dimethyl formamide | Storage | Store at -20°C |
Physical Appearance | A lyophilized powder | 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. |
Ki: 0.5 μM for rat liver arginase
nor-NOHA is a potent and reversible inhibitor of rat liver arginase.
L-Arginine is a common substrate for both nitric oxide synthase (NOS) and arginase in the cell. NOS an catalyze the oxidation of arginine to citrulline and NO. Arginase, on the other hand, catalyzes the hydrolysis of arginine into urea and L-ornithine.
In vitro: Previous study found that nor-NOHA could inhibit the proliferation and induce the apoptosis of HepG2 cells. nor-NOHA was also able to decrease the expression levels of Arg1 and MMP-2, increase the expression levels of P53 and ECD as well as the production of NO. In addition, nor-NOHA inhibited the invasion and migration of HepG2 cells. These data indicated that nor-NOHA could induce cell apoptosis and inhibit the ability of invasion and migration of HepG2 cells by inhibiting Arg1 [1].
In vivo: Animal study showd that nor-NOHA treatment could fully restore the aortic response to Ach to that of healthy rats. The results also showed that such beneficial effect was mediated by an increase in NOS activity and EDHF and reduced superoxide anion production. In addition, nor-NOHA could decrease IL-6 and VEGF plasma levels in AIA rats. Whereas, the treatment did not modify arthritis severity in AIA rats [2].
Clinical trial: So far, no clinical study has been conducted.
References:[1] Li X, Zhu F, He Y, Luo F. Arginase inhibitor nor-NOHA induces apoptosis and inhibits invasion and migration of HepG2 cells. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi. 2017 Apr;33(4):477-482.[2] Prati C, Berthelot A, Kantelip B, Wendling D, Demougeot C. Treatment with the arginase inhibitor Nw-hydroxy-nor-L-arginine restores endothelial function in rat adjuvant-induced arthritis. Arthritis Res Ther. 2012 May 30;14(3):R130.
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而且保真性要高一点的,因为今后要用来做表达
不过。。。。我时常用那种过期一两年的。。。。也能反转出来。只要你保存得当就可以了。一般是-20以下保存。
TERT是端粒酶逆转录酶
人的端粒酶是由端粒酶逆转录酶、端粒酶RNA和一种假尿嘧啶合成酶组成
在进行RT反应之前,应考虑以下几个方面:
1、RNA
成功的cDNA合成来自高质量的RNA,高质量的RNA至少应保证全长并且不含逆转录酶的抑制剂,如EDTA或SDS。在提取RNA的过程中,要特别防止RNase的污染,同时在逆转录反应中经常加入RNase抑制剂以增加cDNA合成的长度和产量。RNase抑制剂要在第一链cDNA合成反应中,在缓冲液和还原剂(如DTT)存在的条件下加入,因为cDNA合成前的过程会使抑制剂变性,从而释放结合的可以降解RNA的RNase。蛋白RNase抑制剂仅防止RNaseA,B,C对RNA的降解,并不能防止皮肤上的RNase,因此尽管使用了这些抑制剂,也要小心不要从手指上引入RNase,实验过程中经常更换新手套。
2、引物的选择
OligodT
选择OligodT时,要求RNA必须有PolyA,所以真核生物的mRNA都适用。适合长链甚至全长mRNA的RT,所以对RNA样品的质量要求较高,最好不要有明显的DNA污染、RNA降解和RNA断裂。假如想探索新的mRNA进行RT反应,建议推荐使用OligodT引物。使用OligodT引物要比随机引物和特异性引物的稳定性要好。
随机引物
适合各种RNA的RT,尤其适合模板丰度很低的情况(比如某个gene表达量很低)。选择随机引物时,第一链cDNA合成反应中就是以所有的RNA为模板,然后进行PCR反应时设计引物进行特异性扩增。同时要注意随机引物的量和总RNA量之间的关系,一般建议每5μg总RNA的随机引物的用量为50ng,如果每5μg总RNA的随机引物的用量超过250ng,可能会导致小片段产物(<500bp)的增加和长片断、全长产物产物的降低。
特异性引物
特异性引物只能用你设计引物时的下游引物做RT,引物设计质量影响RT的结果,而且不同引物退火温度本来就不相同,所以按照说明书按照一个温度做不是最佳选择,一般不推荐。向左转|向右转

