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B cell
(redirected from B-cells)

    Also found in: Medical, Wikipedia, Hutchinson 0.07 sec.

B cell

One of the two types of lymphocytes (the others being T cells). All lymphocytes begin their development in the bone marrow. B cells are involved in so-called humoral immunity; on encountering a foreign substance (antigen), the B lymphocyte differentiates into a plasma cell, which secretes immunoglobulin (see antibody).
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Blood cells that perform different jobs - such as antibody-producing B-cells, or invader-gobbling macrophages - wear different CD-protein uniforms, which are assigned a number as they are found by immunologists.
Blood cells traced to a common ancestor by Ezzell, Carol / Science News
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