Astressin 2B

Cat. No. 2391

Astressin 2B Ac-Asp-Leu-Ser-D-Phe-His-α-methyl-Leu-Leu-Arg-Lys-Nle-Ile-Glu-Ile-Glu-Lys-Gln-Glu-Lys-Glu-Lys-Gln-Gln-Ala-cyclo(γ-Glu-Asn-Asn-ε-Lys)-Leu-Leu-Leu-Asp-α-methyl-Leu-Ile-NH2

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Biological Activity

Potent and selective corticotropin-releasing factor receptor 2 (CRF2) antagonist (IC50 values are 1.3 and > 500 nM for CRF2 and CRF1 respectively). Antagonizes CRF2-mediated inhibition of gastric emptying.

Technical Data

M.Wt:
4041.69
Formula:
C183H307N49O53
Sequence:
DLSFHLLRKXIEIEKQEKEKQQAENNKLLLDLI

(Modifications: Asp-1 = N-terminal Ac, Phe-4 = D-Phe, Leu-6 = α-methyl-Leu, X = Nle, Glu-24 = γ-Glu, Lys-27 = ε-Lys, Leu-32 = α-methyl-Leu, Lactam Bridge = Glu-24 - Lys-27)

Solubility:
Soluble to 1 mg/ml in water
Storage:
Store at -20°C
CAS No:
681260-70-8

The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis.
All Tocris products are intended for laboratory research use only.

Certificate of Analysis / Product Datasheet / Safety Data Sheet

Certificate of Analysis / Product Datasheet
Select another batch:

Henry et al (2006) The effect of lateral septum corticotropin-releasing factor receptor 2 activation on anxiety is modulated by stress. J.Neurosci. 26 9142. PMID: 16957071.

Hoare et al (2005) Peptide ligand binding properties of the corticotropin-releasing factor (CRF) type 2 receptor: pharmacology of endogenously expressed receptors, G-protein-coupled sensitivity and determinants of CRF2 receptor selectivity. Peptides 26 457. PMID: 15652653.

Rivier et al (2002) Potent and long-acting corticotropin releasing factor (CRF) receptor 2 selective peptide competitive antagonists. J.Med.Chem. 45 4737. PMID: 12361401.

If you know of a relevant reference for this product please let us know.

Citations are publications that use Tocris products. Selected citations for Astressin 2B include:

Boyson et al (2014) Social stress and CRF-dopamine interactions in the VTA: role in long-term escalation of cocaine self-administration. J Neurosci 34 6659. PMID: 24806691.

Kash et al (2008) Dopamine enhances fast excitatory synaptic transmission in the extended amygdala by a CRF-R1-dependent process. Invest Ophthalmol Vis Sci 28 13856. PMID: 19091975.

Do you know of a great paper that uses Astressin 2B from Tocris? If so please let us know.

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Keywords: Astressin 2B, supplier, Selective, CRF2, antagonists, Corticotropin-Releasing, Factor2, Receptors, Astressin2B, Tocris Bioscience, CRF2 Receptor Antagonist products

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