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Ligand binding properties of the new mutant hMC3Rs with NDP-MSH (A) and α-MSH (B) as the ligand. Different concentrations of unlabeled NDP-MSH or α-MSH competitively displaced the binding of 125I-NDP-MSH to hMC3Rs on intact cells. Results are expressed as percentage of WT binding ± range from duplicate determinations within one experiment. All experiments were performed at least three times.
