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Construction and Screening of a Phage Display Library of Single Chain Fv Antibody Efficiently from Mouse Immunized with Ovalbumin |
Qiao-li LANG,Lin YU,Qi-lin HE,Liang-peng GE(),Xi YANG() |
Chongqing Academy of Animal Sciences, Key Laboratory of Pig Industry Sciences, Chongqing Research Center for the Development and Utilization of Medical Animal Resources, Chongqing 402460, China |
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Abstract Objective:to establish an efficient method for construction of a phage display library of single chain Fv (scFv) antibody efficiently from mouse immunized with ovalbumin (OVA) and obtain anti-OVA single chain antibody.Methods:Balb/C mice were immunized with OVA. The heavy chain and light chain variable region gene of immunoglobulin were amplified from mRNA of spleen cells of mice with high serum OVA antibody titer by RT-PCR and joined by a DNA linker with seamless cloning. These fragments were inserted into phage expression vector to construct a phage display library. After measurement of library capacity, affinity selection and ELISA analysis were run to find high affinity scFv. Its protein was expressed by Epxi-CHO cells and identified by Western blot analysis.Results:The OVA scFv phage display library was constructed and its library capacity was 1.2 x 10 7 cfu. Eight high affinity scFv were screened from this library. The 2# clone with the highest affinity was cloned into the eukaryotic expression vector and expressed in expi-CHO cells. The Western blot analysis showed that it is a soluble antibody. Conclusion:A highly efficient method for construction of a scFv phage library and generated a high affinity OVA scFv antibody are established. These laid a good foundation for the development of the research of OVA ELISA analysis kit.
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Received: 15 July 2018
Published: 06 December 2018
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Corresponding Authors:
Liang-peng GE,Xi YANG
E-mail: geliangpeng1982@163.com;406162197@qq.com
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