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
found only in IgG molecules
both (a) and (b)

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Anti Bodies
The main function of antibodies is to

generate antigens, thus conferring immunization
chemically combine with the antigen which induces it, inactivate the antigen and protect the body from disease
protect the circulatory system
kill all the foreign bodies

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Anti Bodies
Papain digest IgG into

three Fab fragments and two Fc fragments
three Fab fragments and three Fc fragments
two Fab fragments and one Fc fragment
two Fab fragments and two Fc fragments

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