Anti Bodies
Cleavage of an IgG molecule by a specific protease can produce

an antigen-binding site and two constant regions
two Fab fragments and one Fc fragment
an inactive mixture of oligopeptides
two heavy chain-light chain dimers

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Anti Bodies
Each IgA antibody molecule consists of

four polypeptide chain and has two antigen binding site
two polypeptide chain and has one antigen binding site
two polypeptide chain and has two antigen binding site
three polypeptide chain and has two antigen binding site

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