PTP1B的酶活性检测依赖于使用合适的底物。常用的人工底物是pNPP（p-nitrophenyl phosphate），它被PTP1B催化生 成p-nitrophenol，后者在405 nm处具有吸光特性。通过测定吸光度的变化可以定量评估PTP1B的酶活性。 pNPP是PTP1B的非特异性底物。在PTP1B的作用下，pNPP中的磷酸酯键 ...

吡啶-4-甲醛是一种有机化合物，化学式为C 5 H 4 NCHO，是吡啶甲醛的同分异构体之一。它是无色液体，久置后会变为黄色或棕色。它可以发生芳香醛的反应，如还原胺化和生成席夫碱。 [1] 它可以和吡咯缩合，得到四吡啶基卟啉。 [2] 事实速览 吡啶-4-甲醛, 识别 ...

Meerwein芳基化反应（Meerwein arylation），由 Hans Meerwein 在1939年报道。 芳基重氮盐在金属盐类存在下对缺电子烯烃的加成反应。产物为取代芳香族化合物。[1][2] 烯烃上的吸电子基团降低了烯烃双键的电子密度。 反应的具体机理仍不清楚。[3] 有认为此反应为自由基 ...

Pigment Orange 2 has been used in the past in Canada as an orange colorant dye in inks, paper, paint coatings and plastics. Based on the most recent data available, Pigment Orange 2 is not ...

Implantable medical devices such as catheters are indispensable in the management of critically and chronically ill patients for the administration of electrolytes, drugs, parenteral nutrients ...

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SCP1 as a nuclear transcriptional regulator acts globally to silence neuronal genes and to affect the dephosphorylation of RNA Pol ll. However, we report the first finding and description of SCP1 as a ...

Antibody Responses,Dengue Infection,Dengue Virus,Flavivirus,Severe Dengue,96-well ELISA Plates,Acute Dengue,Acute Dengue Infection,C-terminal Region,Community Cohort ...

Fatty or oily molecules called lipids are essential components of the membranes of cells and important signaling molecules too. They are made in specific compartments of the cell, but most are found ...