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Lee, Woochang,Oh, Byung-Keun,Kim, Yong-Wan,Choi, Jeong-Woo American Scientific Publishers 2006 Journal of Nanoscience and Nanotechnology Vol.6 No.11
<P>In the immunoassay based on surface plasmon resonance (SPR) system, the signal enhancement was done by means of the conjugate of gold (Au) nanoparticle-antibody fragment. Antibody fragment was prepared for the improved immobilization based on Au-thiol interaction. Through the ellipsometric analysis on surface, the conjugation between Au and antibody fragment was performed in the oriented manner. The optimal fabrication conditions such as concentration and incubation time were determined for the constant size of the fabricated nanoparticle-antibody conjugate. Through the plot of SPR angle difference versus antigen concentration, the linear correlation was achieved, of which the detection limit was 100 fg/ml.</P>
Lee Heerah,Kim Hyun-Ki,Yang Dong-Hoon,Hong Yong Sang,Lee Woochang,Lim Seok-Byung,Byeon Jeong-Sik,Chun Sail,Min Won-Ki 대한진단검사의학회 2021 Annals of Laboratory Medicine Vol.41 No.1
Dear Editor, Constitutional variants of the tumor suppressor gene adenomatous polyposis coli (APC) cause familial adenomatous polyposis (FAP), an autosomal dominant disorder characterized by numerous adenomatous colorectal polyps [1]. We detected a novel synonymous splice variant of APC in a family with FAP by next generation sequencing (NGS) and confirmed its impact on splicing by RNA sequencing.
Fabrication of Protein A-Viologen Hetero Langmuir- Blodgett Film for Fluorescence Immunoassay
Lee, Woochang,Chun, Bum-Suk,Oh, Byung-Keun,Lee, Won-Hong,Park, Jeong-Woo The Korean Society for Biotechnology and Bioengine 2004 Biotechnology and Bioprocess Engineering Vol.9 No.4
Protein A molecular thin film was fabricated as a platform of antibody-based biosensor. For the immobilization of the protein A thin film, a viologen multilayer was built up using the Langmuir-Blodgett (LB) technique, and then, protein A was adsorbed on the viologen LB film by an electrostatic interaction force, which was formed as a hetero-film structure. For the deposition of viologen, surface pressure area ($\pi$-A) isotherm was investigated. The fabricated protein A-viologen hetero LB film was investigated using atomic force microscopy (AFM). Using the developed molecular film, antibody immobilization and fluorescence measurement was carried out.