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• 产品描述： BEC hydrochloride is a slow-binding and competitive Arginase II inhibitor with Ki of 0.31 μM and 30 nM at pH 7.5 and pH 9.5, respectively

• 靶点： Ki: 0.31 μM (BEC hydrochloride, at pH 7.5) and 30 nM (BEC hydrochloride, at pH 9.5);Arginase

• 体外研究：
  The X-ray crystal structure of the arginase-BEC complex has been determined at 2.3 Å resolution from crystals perfectly twinned by hemihedry. The structure of the complex reveals that the boronic acid moiety undergoes nucleophilic attack by metal-bridging hydroxide ion to yield a tetrahedral boronate anion that bridges the binuclear manganese cluster, thereby mimicking the tetrahedral intermediate (and its flanking transition states) in the arginine hydrolysis reaction.

• 体内研究：
  Administration of the arginase inhibitor BEC decreases arginase activity and causes alterations in NO homeostasis, which are reflected by increases in S-nitrosylated and nitrated proteins in the lungs from inflamed mice. BEC enhances perivascular and peribronchiolar lung inflammation, mucus metaplasia, NF-κB DNA binding, and mRNA expression of the NF-κB-driven chemokine genes CCL20 and KC, and leads to further increases in airways hyperresponsiveness. Animal Model: C57BL/6J wild-type mice, mice deficient in arginase 2 (Arg2-/-), mice deficient in both arginase 1 and 2 (Arg1-/-Arg2-/-), and mice deficient in NOX2 (NOX2-/- Dosage: 20 mg/kg. Administration: I.V., in 0.9% saline, 1 hour before the injection of LPS. Result: BEC robustly reduced VEGF expression in neuroglia (72% reduction) and macrophage/microglia (87% reduction).

• 参考文献：
  1. Colleluori DM, et al. Classical and slow-binding inhibitors of human type II arginase. Biochemistry. 2001 Aug 7;40(31):9356-62. 2. Kim NN, et al. Probing erectile function: S-(2-boronoethyl)-L-cysteine binds to arginase as a transition state analogue and enhances smooth muscle relaxation in human penile corpus cavernosum. Biochemistry. 2001 Mar 6;40(9):2678-88. 3. Ckless K, et al. Inhibition of arginase activity enhances inflammation in mice with allergic airway disease, in association with increases in protein S-nitrosylation and tyrosine nitration. J Immunol. 2008 Sep 15;181(6):4255-64.

• 溶解性： Soluble  in  DMSO、H2O

• 保存条件： -20℃

• 配置溶液浓度参考：
  

  	1mg	5mg	10mg
  1 mM	4.357 ml	21.787 ml	43.575 ml
  5 mM	0.871 ml	4.357 ml	8.715 ml
  10 mM	0.436 ml	2.179 ml	4.357 ml
  50 mM	0.087 ml	0.436 ml	0.871 ml

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本计算器可帮助您计算出特定溶液中溶质的质量、溶液浓度和体积之间的关系，公式为：

质量 (mg) = 浓度 (mM) x 体积 (mL) x 分子摩尔量 (g/mol)

• pg ng μg mg g kg =
  fM pM nM μM mM M *
  nL μL mL L *