Prostaglandin D2 (PGD2) elicits its biological function through interaction with two distinct G protein-coupled receptors, DP1 and CRTH2/DP2. CRTH2 primarily couples to Gi or Gq subunits to mobilize Ca2+, induce cell migration, and up-regulate adhesion molecules.1 CRTH2 mRNA has been detected in various tissues including liver, lung, kidney, brain, heart, thymus, and spleen and in various cell lineages including both hematopoietic and non-hematopoietic cell lines.2 Human CRTH2 is 395 amino acids in length with an estimated molecular weight of 43 kDa. Cayman’s CRTH2/DP2 receptor (C-Term) polyclonal antibody can be used for western blot of CRTH2 on samples of human, mouse, and rat origin. It detects both unglycosylated and glycosylated protein at sizes ranging from 35-40 to 50-70 kDa, as reported by Nagata et al., in 1999.3WARNING This product is not for human or veterinary use.