α-MSH free acid (α-Melanocyte-Stimulating Hormone free acid) is an MC3R and MC4R agonist with EC50s of 0.16 nM and 5.6 nM, respectively. α-MSH free acid activates cAMP generation at MC3R and MC4R.

Activator of protein kinase C; attached to cell permeabilization Antennapedia domain vector peptide. Consists of peptide derived from the C2 domain of PKC β linked by a disulfide bridge to the Antennapedia domain vector peptide. The Antennapedia peptide is actively taken up by intact cells, at 4 or 37°C, ensuring rapid and effective uptake of the activator peptide. Once inside the cell, the disulfide bonds are subjected to reduction in the cytoplasm leading to release of the activator peptide.

Reference standards.