Spontaneous 3H-thymidine incorporation by circulating lymphocytes of normal subjects: relative proportion of T and B cells.

Peripheral lymphocytes of ten normal, healthy subjects were assayed simultaneously for spontaneous 3H-thymidine flash labelling and erythrocyte, active erythrocyte and erythrocyte antibody complement rosette formation. Spontaneous blastogenesis of T lymphocytes is significantly higher than that of B cells. The majority of T lymphocytes incorporating 3H-thymidine are active E rosette-forming cells.