C6H11NO
113.16
特点:
● 纯度高
● 杂质峰少
活动进行中
订购满5000元,200元礼品等你拿
凑单关联产品TOP5
NO.1. TEMP 单线态氧检测
NO.2. BMPO 超氧阴离子和羟自由基检测
NO.3. ROS Assay Kit 活性氧检测
NO.4. SOD Assay Kit 超氧化物歧化酶(SOD)检测
NO.5. Caspase-3 Assay Kit-Colorimetric- 细胞凋亡检测
规格性状
质量约为1.1g
产品概述
由于具有潜在的致癌风险和促进衰老的作用,生物体内的自由基已成为研究的热点。 DMPO是研究自由基最常用的自旋捕获剂。 它适用于捕获氧自由基,尤其是超氧化物,并生成具有特征的EPR信号的加合物。 但是,大多数市售的DMPO包含会引起高背景的杂质。 因此,这些DMPO需要进一步纯化才能在EPR上进行实验。 Dojindo的DMPO实行严格的质量管控,没有杂质引起的背景问题,因此不需要任何预纯化处理。
产品特点
•超高纯度
•更高的信噪比
•无需预纯化
同仁化学研究所 (Dojindo) 的DMPO没有杂质 (*) 检出
以羟自由基的Fenton反应(黑色)和空白(蓝色)为例,同仁化学研究所(Dojindo)的峰更清晰,S/N比例更高
应用
自旋捕获剂,EPR(ESR)检测,超氧阴离子,羟基自由基
原理
自旋捕捉ESR技术是一种检测活性氧的最可靠的办法,它能提供具有特征的ESR信号。DMPO采用一种特殊的敏感方法,可以捕捉超氧阴离子和羟自由基等,分别产生独特的ESR光谱。因此它是探测生物系统内ROS的强有力工具。
操作步骤
SOD清除超氧阴离子的活性检测
1. 将15 μl的DMPO溶液和 50 μl的5 mM的次黄嘌呤加入到35 μl的0.1 M的磷酸盐缓冲液 (pH 7.8) 中。
2. 加入50 μl的待测SOD标准品或待测样品,涡旋振荡 1-2 s。
3. 加入50 μl的0.4 U/ml的黄嘌呤氧化酶之后立即涡旋振荡。
4. 放置一段时间 (例如 1 min) 将溶液转入ESR样品管中检测。
5. 通过峰值计算相对强度(DMPO-O2-/Mn2+)。
C-,N-,S-基自由基的检测
1. 制备100 mM含有25 μM Diethylenetriaminepentaacetic Acid (DTPA)的磷酸盐缓冲液 (pH 7.4),作为过渡金属螯合剂。
2. 制备以下过氧化物酶底物:A) 100 mM 甲酸钠(HCOONa);B) 100 mM氰化钾(KCN);C) 100 mM叠氮钠(NaN3);D) 含有100 mM亚硫酸钠 (Na2SO3)的100 mM磷酸盐缓冲液 (pH 7.4)。
3. 制备4.0 mg/ml(~100 μM)的辣根过氧化物酶 (HRP)溶液和1 mM H2O2溶液。
4. 制备浓度为1 M的DMPO溶液。
5. 在离心管中加入130 μl的缓冲液,加入20 μl已配好的1 M的DMPO溶液,再加入20 μl底物储存液,10 μl的1 mM H2O2溶液,最后加入20 μl HRP触发反应。
6. 涡旋振荡离心管,加入到进样系统中,检测图谱。
7. 加样后调节光谱并得到图谱。各物质的终浓度为:100 mM DMPO,10 mM的底物,50 μM H2O2,10 μM HRP。
数据和操作流程由Bruker公司友情提供
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