Anti Bodies
A secondary antibody is an antibody that

binds to another antibody
has been used in prior experiments
is synthetically produced
is produced in boostered animals

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

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