Fig. 3.

The effects of l-dopa and dopamine on the redox state of pancreatic islets. A, NAD(P)H autofluorescence from isolated islets was measured at 8 mm glucose and at 16.7 mm glucose and with 10 μm dopamine or 10 μm l-dopa as indicated; results are normalized to the maximum signal obtained with 3 mm sodium cyanide (n =2–4). B, Islets were incubated with or without 10 μm l-dopa for 30 min before the experiment after which NAD(P)H autofluorescence was measured at 8 mm and 16.7 mm glucose (n = 3–4).