FIG. 2.

Percentage of plaque-forming cells at various glucose concentrations. Dispersed islet cells from short-term (filled circles) and long-term (open circles) cultures were exposed to different glucose concentrations in the presence of insulin antiserum for 1 h. Datum points express the number of cells secreting insulin over the total number of isolated islet cells. The values shown represent the mean ± SEM from three experiments. Each experiment was performed using a pool of islets obtained from four rats.