Anthraquinonyl glycoside facilitates the standardization of graphene electrodes for the impedance detection of lectins.
Anthraquinonyl glycoside facilitates the standardization of graphene electrodes for the impedance detection of lectins.
复制标题
蒽醌苷促进凝集素阻抗检测石墨烯电极的标准化
DOI:
10.1186/s13065-014-0067-y
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发表时间:
2014
影响因子:
--
通讯作者:
Long YT
中科院分区:
文献类型:
--
作者:
Zhu BW;Cai L;He XP;Chen GR;Long YT
Background
Construction of electrochemical impedance sensors by the self-assembly technique has become a promising strategy for the `label-free' detection of protein-ligand interactions. However, previous impedance sensors are devoid of an inherent electrochemical signal, which limits the standardization of the sensors for protein recognition in a reproducible manner.
Results
We designed and synthesized an anthraquinonyl glycoside (AG) where the anthraquinone (AQ) moiety can bind to the surface of a graphene-based working electrode while the glycoside serving as a ligand for lectin. By measuring the inherent voltammetric signal of AQ, the glycosides decorated on the working electrode could be simply quantified to obtain electrodes with a unified signal window. Subsequently, impedance analysis showed that the `standardized' electrodes gave a reproducible electrochemical response to a selective lectin with no signal variation in the presence of unselective proteins.
Conclusion
Anthraquinone-modified ligands could be used to facilitate the standardization of electrochemical impedance sensors for the reproducible, selective analysis of ligand-protein interactions.
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