首页> 外文期刊>Analytical Sciences >A “Turn-On” Fluorescent Chemosensor Based on Peptidase for Detecting Copper(II)
【24h】

A “Turn-On” Fluorescent Chemosensor Based on Peptidase for Detecting Copper(II)

机译:一种基于肽酶的“接通”荧光化学传感器,用于检测铜(II)

获取原文
           

摘要

A new fluorescent chemosensor for Cu(II) ions was designed and synthesized on the basis of the sequence-specific cleavage of the peptide bond by the peptidase (metal or metal complexes). In the chemosensor system, the substrate was labeled with a FAM fluorophore (6-carboxyfluorescein) at the N-terminal and with a Dabcyl quencher 4-(4′-dimethylaminophenylazo)benzoic acid at the ε-N of C-terminal Lys. In the presence of Cu(II), the substrate strand is cleaved, and the release of the cleaved fragment results in a significant fluorescence increase. The design was aided by the FRET study that showed a “turn-on” response for Cu(II) in an aqueous medium. Under optimum conditions, the novel chemosensor described here had a linear response range for Cu(II) from 1.0 × 10−8 to 1.0 × 10−6 mol dm−3 with a detection limit of 1.0 × 10−8 mol dm−3.
机译:在肽酶(金属或金属配合物)对肽键进行序列特异性切割的基础上,设计并合成了一种新型的Cu(II)离子荧光化学传感器。在化学传感器系统中,用N末端的FAM荧光团(6-羧基荧光素)和C末端Lys的ε-N处的Dabcyl淬灭剂4-(4'-二甲基氨基苯基偶氮)苯甲酸标记底物。在Cu(II)存在下,底物链被切割,切割片段的释放导致荧光显着增加。 FRET研究协助了该设计,该研究显示了水性介质中Cu(II)的“开启”响应。在最佳条件下,此处描述的新型化学传感器对Cu(II)的线性响应范围为1.0×10-8到1.0×10-6 mol dm-3,检测极限为1.0×10-8 mol dm-3。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号