Anti Bodies
The immunoglobulin fold is

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

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Anti Bodies
Antibodies in the human immune system can identify approximately 108 different molecules Which one of the following is correct?

Most of these antibodies recognize small organic molecules
Many of these molecules are self-antigens
Most of these antibodies recognize proteins
This diversity is generated from 108 different immunoglobin genes

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