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KeyTec® cAMP TR-FRET KIT

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  • 30081.94/

上海盛祺兆生物科技有限公司
15000223961 021-54935173
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  • Brand  VKEY-BIO
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Last Updated 2025-08-12 20:02

KeyTec® cAMP TR-FRET KIT

研究背景 G蛋白偶联受体(GPCRs)是人类最大的膜蛋白家族,大约有800个成员,其中一半是嗅觉受体。这些GPCRs分布在细胞膜表面,接受不同配体的刺激,包括:光线、激素、气味、抗原、神经递质甚至另一个细胞的表面信号分子。参与调节几乎整个身体系统,从感觉接收到调节细胞活动、运动和死亡。尽管GPCRs和其配体数量多,GPCRs与配体结合后胞内信号的传导通过四个G蛋白家族(Gαs、Gαi/Gα0、Gαq/Gα11和Gα12/Gα13)来实现。G蛋白是异源三聚体,由三个不同的亚基组成:一个α亚基、一个β亚基和一个γ亚基。GPCRs信号转导机制主要分为三类:Gq(磷脂酶C)、Gi和Gs(分别抑制和刺激腺苷酸环化酶,调节cAMP产生)。细胞内cAMP的定量测定可用于评价药物对腺苷酸环化酶激活或抑制作用的效价。 试剂盒原理介绍 当反应体系中不存在未标记的cAMP时,由biotin标记的cAMP和SA标记的Eu组成的cAMP示踪复合物与染料Rd标记的抗体结合。通过外部激发cAMP示踪复合物的Eu,实现能量共振转移到Rd标记的抗体上,使得反应体系中检测到很强的665 nm信号。当检测样品中存在未标记的cAMP,cAMP示踪复合物与Rd标记抗体的结合被阻断,Eu激发后无法实现能量共振转移,反应体系中检测到的665 nm信号降低。
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