| helper T cells |
SEE: cell, helper T.
Ãâó:
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| helper c.’s |
differentiated T lymphocytes whose cooperation (help) is required for the production of antibody against most (T-dependent) antigens. Activation of B lymphocytes (B cells) requires recognition of the antigenic determinant against which specific antibody is produced by antigen receptors on a B cell, recognition of some other antigenic determinant by antigen receptors on a helper cell, and a signal passed from the helper cell to the B cell, probably requiring direct cell-to-cell contact. Murine helper cells are marked by the Ly-1 antigen, human helper cells by the CD4 antigen. See also lymphocyte.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| helper T l.’s |
helper cells.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| helper v. |
a virus (e.g., the Rous-associated virus) that aids the development of a defective virus by supplying or restoring the activity of a viral gene or enabling a defective virus (e.g., the Rous sarcoma virus) to form a protein coat.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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