Research Paper | Published:

Renaturation, Purification and Characterization of Recombinant Fab-Fragments Produced in Escherichia coli

Bio/Technologyvolume 9pages157162 (1991) | Download Citation



Cytoplasmatic expression of murine antibody chains in Escherichia coli results in the formation of insoluble and inactive protein aggregates (inclusion bodies). By systematic variation of the parameters influencing the folding, formation of disul-fide bonds and association of the constituent polypeptide chains, we have designed a renaturation procedure allowing the production of microbially expressed Fab-fragments at yields up to 40 percent of the total amount of recombinant protein. The strategy of optimization is generally applicable for disulnde containing proteins produced as inclusion bodies in bacteria. The purified recombinant antibody fragments obtained are identical with the native murine Fab in all functional and phys-icochemical parameters tested.

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  1. Rainer Rudolph: Corresponding author.


  1. Universität Regensburg, Institut für Biophysik and Physikalische Biochemie, Postfach, D-8400, Regensburg, FRG

    • Johannes Buchner
  2. Boehringer Mannheim GmbH, Biochemical Research Center, Nonnenwald 2, D-8122, Penzberg, FRG

    • Rainer Rudolph


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