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

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

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Anti Bodies
Each IgA antibody molecule consists of

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

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