MCH (human, mouse, rat) is a potent peptide agonist of MCH-R and exhibits binding IC50 values of 0.3nM and 1.5 nM for MCH1R and MCH2R, respectively. MCH (human, mouse, rat) is a highly sensitive to MCH-2R in a CHO cell line and monitoring mobilization of intracellular calcium with FLIPR, exhibits functional activation EC50 values of 3.9 nM and 0.1nM for human MCH-1R and MCH-2R, respectively.