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A System for Repertoire Cloning and Phage Display of Murine and Leporid Antibody Fragments

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Even though rabbit antibodies (Abs) are known to exceed murine Abs with respect to specificity, affinity, and stability, cloned leporid immune repertoires have been rarely considered in recombinant Ab preparation for environmental analysis. We have developed a set of four tetp/o -based phasmid vectors that allow the efficient cloning of both murine and leporid Ab repertoires. These vectors differ in the design of the cloning sites, choice of signal peptides, and antibiotic selection markers. A set of 39 primer oligodeoxynucleotides has been developed for the PCR amplification of rabbit Ab genes, representing the most exhaustive coverage of the leporid immune repertoire described so far. The atrazine-specific murine Fab fragment K411B and a cloned V-gene repertoire from sulfonamide-immunized rabbits were used to compare these phasmids with respect to expression of Fab fragments, phagemid titers, and number of Fab displaying phagemid particles. Our results show that the ratio of recombinant phagemids could be increased up to 65 of total phage titer by utilizing the appropriate phasmid. Based on this system, the selection of two sulfonamide-specific rabbit Abs, SA2 23 and SA2 90, was accomplished after a single phagemid panning round.
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Document Type: Research Article

Affiliations: 1: Technische Universitt Mnchen, Lehrstuhl fr Zellbiologie, Alte Akademie 12, 85350 Freising-Weihenstephan, Germany. 2: Technische Universitt Mnchen, Lehrstuhl fr Bioanalytik, Emil-Erlenmeyer-Forum 5, 85350 Freising-Weihenstephan, Germany. 3: Technische Universitt Mnchen, Lehrstuhl fr Biologische Chemie, Emil-Erlenmeyer-Forum 5, 85350 Freising-Weihenstephan, Germany.

Publication date: 01 January 2010

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  • The Journal of AOAC INTERNATIONAL publishes refereed papers and reviews in the fields of chemical, biological and toxicological analytical chemistry for the purpose of showcasing the most precise, accurate and sensitive methods for analysis of foods, food additives, supplements and contaminants, cosmetics, drugs, toxins, hazardous substances, pesticides, feeds, fertilizers and the environment available at that point in time. The scope of the Journal includes unpublished original research describing new analytical methods, techniques and applications; improved approaches to sampling, both in the field and the laboratory; better methods of preparing samples for analysis; collaborative studies substantiating the performance of a given method; statistical techniques for evaluating data. The Journal will also publish other articles of general interest to its audience, e.g., technical communications; cautionary notes; comments on techniques, apparatus, and reagents.
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