A combinatorial phage display library of human single-chain antibody fragments (scFv) was constructed on the basis of variable domains of heavy (Vh) and light (VI) genes cloned from the lymphocytes of six healthy donors. The size of the library was 2? 10(8) independent clones. Single-chain antibodies against recombinant human TNF?, vaccinia virus and virus-like particles formed by core protein of hepatitis B virus were selected from the library. Unique scFv sequences were identified using the HaeIII fingerprinting. The specificity of the selected clones was proved by the Western-blot analysis.
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