Figure 3

Detection of extracellular (A) and intracellular (B) cAMP in response to increasing concentrations of α-MSH. Symbols: filled circles, mouse melanoma B16F10C1 (positive control); open circles, HBL melanoma cells; filled squares, A375-SM melanoma cells; open squares, C8161 melanoma cells (means±s.e.m., n=3).