B cell
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Tweet n. Any of a class of lymphocytes that, when activated by a specific antigen and usually also by helper T cells, proliferate and differentiate into antibody-secreting plasma cells or memory cells. In mammals, B cells mature in the bone marrow. Also called B lymphocyte. [b(ursa-dependent) cell, after the bursa of Fabricius, a gland in birds where the cells mature and the first such tissue found in vertebrates.] |
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