Anti Bodies
The immunoglobulin fold is

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

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Anti Bodies
A polyclonal antibody response

is produced only in response to polymeric antigens
occurs during the lag phase of the immune response
is produced by several B cells recognizing different pitopes on the same antigen
violates clonal selection

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