Endogenous substance P homolog that is a selective agonist at the tachykinin NK1 receptor (IC50 values are 1.8, 370 and 480 nM for NK1, NK3 and NK2 receptors respectively). Has proliferative and antiapoptotic actions on B-cells in vitro and is antihyperte
Hemokinin 1 (mouse) is a selective excitogen 1 receptor agonist with Ki values of 0.175 nM for the human NK1 receptor and 560 nM for the human NK2 receptor.