T Lymphocytes B lymphocytes Comments
Receptors Complement C3b C4b Immunoglobulin Sheep erythrocyte (E receptor) - - - + + + + - Receptors mainly for IgM but also for IgA, IgG and IgE Present on 60-65% of all circulating T lymphocytes
Surface antigens/markers 1a Immunoglobulin CD3 (T3) CD4 (T4) CD5 (T5) CD8 (T8) + - + + + + - + - - - - Present on circulating lymphocytes and involved in cell-cell cooperation Circulating T lymphocytes T helper/ inducer cells T suppressor cells T cytotoxic cells/suppressor cells