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Medical Definition of Fab piece
1. The antigen-binding fragment of an immunoglobulin molecule, consisting of both a light chain and part of a heavy chain. Synonym: Fab piece. (05 Mar 2000)
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1. The antigen-binding fragment of an immunoglobulin molecule, consisting of both a light chain and part of a heavy chain. Synonym: Fab piece. (05 Mar 2000)