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Application of Nanoparticles for Materials Recognition Using Peptide Phage Display Technique - Part II: Magnetic Bio-panning Using Fe3O4 Nanoparticles  

Lee, Chang-Woo (Division of Materials and Chemical Engineering, Hanyang University)
Kim, Min-Jung (Division of Materials and Chemical Engineering, Hanyang University)
Standaert, R. (Biological and Nanoscale Systems Group, Oak Ridge National Laboratory)
Kim, Seyeon (Biological and Nanoscale Systems Group, Oak Ridge National Laboratory)
Owens, E. (Biological and Nanoscale Systems Group, Oak Ridge National Laboratory)
Yan, Jun (Biological and Nanoscale Systems Group, Oak Ridge National Laboratory)
Choa, Yong-Ho (Division of Materials and Chemical Engineering, Hanyang University)
Doktycz, M. (Biological and Nanoscale Systems Group, Oak Ridge National Laboratory)
Lee, Jai-Sung (Division of Materials and Chemical Engineering, Hanyang University)
Publication Information
Korean Journal of Metals and Materials / v.46, no.3, 2008 , pp. 131-134 More about this Journal
Abstract
The magnetism of$Fe_3O_4$ nanoparticles was applied to magnetic bio-panning process for finding specific sequences against $Fe_3O_4$ crystal phase. Vibrating sample magnetometer (VSM) measurement showed that the coercivity of 30 Oe and the saturation magnetization of 55 emu/g were sufficient in controlling particle movement and magnetizing particles in the media, respectively. This ferrimagnetism of nanoparticles practically enhanced panning efficiency by exaggerating centrifuge step and preventing particle loss. Sequencing results showed that histidine which was commonly found in peptide sequences played an important role in the binding onto $Fe_3O_4$ nanoparticle surface. However, various possible motifs were also observed from several neighboring amino acids of histidine.
Keywords
$Fe_3O_4$ nanoparticles; magnetic bio-panning; phage display; histidine; materials recognition;
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