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Urocortin (rat),CAS#:171543-83-2,Molecular Weight:4707.33 Peptide that is more potent than CRF at binding and activating type-2 CRF receptors and shares ~95% sequence with human version. As a mammalian neuropeptide related to fish urotensin and corticotropin-releasing factor, it also serves as an inducer of c-Fos in regions enriched in type-2 CRF receptors.

Urocortin (human),CAS#:176591-49-4,Molecular Weight:4696.31 The peptide exhibits a strong binding affinity towards the types 1, 2a, and 2b corticotropin-releasing factor (CRF) receptors. It is capable of stimulating the accumulation of cyclic adenosine monophosphate (cAMP) from cells that have been transfected with these receptors. Moreover, in vitro experiments have shown that this peptide can induce the release of adrenocorticotropic hormone (ACTH) from dispersed rat

Urocortin II (mouse),Molecular Weight:4153,Purity:95%,CAS#:330648-32-3 This peptide has exhibited considerably higher affinity for both splice variants of the type 2 CRF receptor (CRF-R2) than for those of CRF-R1. The potencies of Ucn II (mouse) in activating CRF-R2a and CRF-R2b were almost the same to that of urocortin (rat).