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Answer to your Health Question

Question:

What are antibodies?

Alice

Answer:

Dear Alice,

Antibodies , or immunoglobulins (Igs), produced by sensitized B cells and their plasma cell offspring in response to an antigen, are a heterogeneous group of proteins that comprise the general class of plasma proteins called gamma globulins.

Antibodies are found not only in plasma but also (to greater or lesser extents) in all body secretions.

Five mayor classes of immunoglobulins have been identified: IgM, IgG, IgD, IgA and IgG.

The immunoglobulin classes share a common basic structure but differ functionality and in their localization in the body.


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