Anti Bodies
Fab fragment has

one antibody binding site
one antigen binding site
two antigen binding site
two antibody binding site

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Anti Bodies
Each IgA antibody molecule consists of

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

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Anti Bodies
IgE provides

complement killings of the cells and phagocytosis
secretions in the body
All of these
immunity against some parasites

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