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What do you mean by immunoglobulin-D

What do you mean by immunoglobulin D?

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a) The molecular weight of IgD is185,000 Daltons and consists of a sedimentation coefficient of 7S.

b) Its concentration in serum is around 3 mg/100ml that comprises around 0.2 percent of total Ig.

c) This is mainly intra vascular in distribution.

d) Its half-life is around 3days.

e) This is rich in carbohydrates.

f) IgD all along with IgM takes place on the surface of un-stimulated or mature B cells and serves as a re-organization receptor for the antigens.

g) No biological consequence or function has been recognized for IgD.   

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