Bombesin, a bioactive peptide first identified in amphibian skin, is related to two mammalian peptides, gastrin-releasing peptide (GRP) and neuromedin B. A family of 3 GPCRs, including NMB-R (BB1), GRP-R (BB2) and BRS-3 (BB3), mediate the biological effects of the peptides. The receptors differ in their affinities for the peptides; BB2 binds to GRP with 50-300-fold greater affinity than to NMB, whereas BB1 binds to NMB with 10-800-fold greater affinity than to GRP. Binding of ligand to BB2 activates Gq to increase intracellular calcium concentrations. GRP stimulates release of gastrin from endocrine cells and stimulates smooth muscle activity in the gastrointestinal tract. In addition, binding of GRP to BB2 stimulates proliferation of a variety of cell types, and has been implicated in the progression of small cell lung cancer and other malignancies. The CNS is also a major site of GRP expression, and GRP and BB2 are involved in the circadian clock, conditioned fear, and food intake.

Product Information
Catalog #:	ACC-RG1251
Gene Name	GRPR
Abbr	CHO-HuGRPR/Apoaequorin
Alias	GRPR,GRP-R
Growth Properties	Adherent
Host Cell	CHO-K1
Morphology	Epithelial-like
Shipping	Dry ice
Product Type	GPCR Expressing Cell
Species	Human
Product Format	frozen
searchKeyword	GRPR,GRP-R

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