Anti Bodies
Antigenic determinants bind to which portions of an antibody?

Only light chains
Variable regions
Only heavy chains
Constant regions

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Anti Bodies
The immunoglobulin fold is

found six times in the IgG molecule
a β-barrel composed of a three- and a four-stranded antiparallel β-sheet
both (a) and (b)
found only in IgG molecules

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Anti Bodies
Each IgA antibody molecule consists of

two 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
three polypeptide chain and has two antigen binding site

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