B-cell antigen receptor
(BCR)
A transmembrane immunoglobulin complex on the surface of a B-cell that binds an antigen and stimulates the B-cell. It is composed of a membrane-bound immunoglobulin, usually IgD or a modified IgM, complexed with another membrane protein (the Ig-a/Ig-b heterodimer).

Microbiology. . 2009.

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