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Protein G와 NHS를 이용하여 고정한 anti-IgG의 검출 성능 비교
신은정 ( Eun Jung Sin ),손영호 ( Young Ho Sohn ),손영수 ( Young Soo Sohn ) 한국센서학회 2010 센서학회지 Vol.19 No.2
We have compared and investigated the detection capabilities of antibody of immunoglobulin G(anti-IgG) immobilized by protein G and N-hydroxysuccinimide(NHS) at the end of the self-assembled monolayer(SAM). Surface plasmon resonance(SPR) sensor has been utilized to measure the interaction between biomolecules. After formation of the protein G and SAM, anti-IgG, bovine serum albumin(BSA) and IgG has been sequently injected. Through the reponse of the SPR, we can conclude that the protein G immobilized anti-IgG better than the SAM. In addition, IgG detection capability of the anti-IgG immobilized by the protein G showed better performance compared with that immobilized by the SAM.
소형 표면 플라즈몬 공명 센서와 이합체 구조를 가진 SAM을 이용한 CRP검출
신은정 ( Eun Jung Sin ),정은정 ( Eun Jung Joung ),조진희 ( Jin Hee Jo ),황동환 ( Dong Hwan Hwang ),손영수 ( Young Soo Sohn ) 한국센서학회 2010 센서학회지 Vol.19 No.6
The detection of C-reactive protein(CRP) using self-assembled monolayer(SAM) was investigated by a portable surface plasmon resonance(SPR) sensor system. The CRP is a biomarker for the possible cardiovascular disease. The SAM was formed on gold(Au) surface to anchor the monoclonal antibody of CRP(anti-CRP) for detection of CRP. Sequence injection of the anti-CRP and bovine serum albumin(BSA) into the sensor system has been carried out immobilize the antibody and to prevent non-specific binding. The portable SPR system has two flow channels: one for the sample measurements and the other for the reference. The output SPR signal was increased with the injection of the anti-CRP, BSA and CRP due to binding of the proteins on the sensor chip. The valid output SPR signal was linearly related to the critical range of the CRP concentration. The experimental results showed the feasibility of the portable SPR system with newly developed SAM to diagnose a risk of the future cardiovascular events.