Chen, Mingjian; Ma, Changbei; Zhao, Han; Yan, Ying published the artcile< Exonuclease III-assisted fluorometric aptasensor for the carcinoembryonic antigen using graphene oxide and 2-aminopurine>, Recommanded Product: 7H-Purin-2-amine, the main research area is carcinoembryonic antigen exonuclease aptasensor graphene oxide aminopurine; Aptamer; Carcinoembryonic antigen; Enzyme; Fluorescence amplification; Fluorescently labelled probe.
A reliable fluorometric assay is described for the determination carcinoembryonic antigen (CEA) using exonuclease III (Exo III) and a 2-aminopurine binding aptamer. In the absence of CEA, dsDNA is degraded by Exo III, and free 2-AP (which has a blue fluorescence with excitation/emission maxima of 310/365 nm) is released. Strong fluorescence is generated after addition of graphene oxide (GO) to the solution However, the 2-AP modified DNA (T2) cannot be degraded in the presence of CEA by Exo III due to the interaction between CEA and aptamer T1. Hence, only weak fluorescence can be detected after addition of GO. In this system, CEA can be quantified in the 0.05 – 2 ng·mL-1 concentration range with a detection limit of 30 pg·mL-1 (at S/N = 3). The method was successfully applied to analyze serum samples for CEA.
Microchimica Acta published new progress about Aptasensors. 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Recommanded Product: 7H-Purin-2-amine.
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem