FIG. 5.
Precursor frequency analysis of the T-lymphocyte response to CCW/M. Various numbers of T lymphocytes were incubated with irradiated PBMC (105/well) with or without CCW/M (1.5 μg/ml) for 7 days. In semilogarithmic plots, the frequency of responding T cells is determined by the number of cells present when 37% of the wells are negative. Twenty-four wells were used for each cell concentration. This experiment was repeated six times. Each graph represents the precursor frequency for one of six subjects.