See F. fragment.
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fast atom bombardment; formalin ammonium bromide; fragment, antigen-binding [of immunoglobulins]; French-American-British [leukemia staging]; functional arm brace
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Fab 'fab n a fragment of an immunoglobulin molecule formed when the molecule is digested by papain and containing one antigen-binding site, one complete light chain, and part of one heavy chain called also Fab fragment
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French-American-British; see under classification.Medical dictionary. 2011.