Cat. No. 5940new

AdTx1 Leu-Thr-Cys-Val-Thr-Ser-Lys-Ser-Ile-Phe-Gly-Ile-Thr-Thr-Glu-Asp-Cys-Pro-Asp-Gly-Gln-Asn-Leu-Cys-Phe-Lys-Arg-Arg-His-Tyr-Val-Val-Pro-Lys-Ile-Tyr-Asp-Ser-Thr-Arg-Gly-Cys-Ala-Ala-Thr-Cys-Pro-Ile-Pro-Glu-Asn-Tyr-Asp-Ser-Ile-His-Cys-Cys-Lys-Thr-Asp-Lys-Cys-Asn

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Alternative Name: ρ-Da1a

Biological Activity

Selective, high affinity, non-competitive α1A adrenoceptor antagonist (Ki = 0.35 nM). Exhibits no significant activity against a range of other GPCRs, including α2A, β1 and β2 adrenoceptors . Antagonizes effects of phenylephrine (Cat. No. 2838) on isolated rabbit prostate muscle in vitro and on intra-urethral pressure in rats.

Technical Data


(Modifications: Disulfide bridge: 3-24, 17-42, 46-57, 58-63)

Soluble to 1 mg/ml in water
Store at -20°C

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 / Safety Data Sheet

Certificate of Analysis: View current batch
Safety Data Sheet: View Safety Data Sheet

Palea et al (2013) Effects of ρ-Da1a a peptidic α1A-adrenoceptor antagonist in human isolated prostatic adenoma and anaesthetized rats. Br.J.Pharmacol. 168 618. PMID: 23005263.

Quinton et al (2010) Isolation and pharmacological characterization of AdTx1, a natural peptide displaying specific insurmountable antagonism of the α1A-adrenoceptor. Br.J.Pharmacol. 159 316. PMID: 20015090.

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Keywords: AdTx1, supplier, selective, high, affinity, non-competitive, antagonists, antagonism, alpha1A, adrenoceptors, α1A, a1A, Tocris Bioscience, Adrenergic α1 Receptor Antagonist products

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