Examlex
When tested with an ohmmeter, a diode should have forward resistance and reverse resistance.
Null Cells
Lymphocytes that lack surface markers distinctive of T or B cells, often associated with natural killer cell activity.
Variable Regions
Parts of antibodies that differ from one antibody to another, enabling them to bind to a specific antigen.
T-cell Receptors
These receptors on the surface of T-cells recognize and bind to antigens presented by other cells, initiating an immune response.
Epitopes
Distinct regions on an antigen that the immune system identifies, particularly through antibodies, B cells, or T cells.
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