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  • Title: Molecular cloning of the canine angiotensin II receptor. An AT1-like receptor with reduced affinity for DuP753.
    Author: Burns L, Clark KL, Bradley J, Robertson MJ, Clark AJ.
    Journal: FEBS Lett; 1994 Apr 25; 343(2):146-50. PubMed ID: 8168620.
    Abstract:
    Canine aortic strip studies revealed insensitivity of angiotensin II (AII)-induced aortic contraction to inhibition by the non-peptide antagonist DuP753 (pKB = 6.7 +/- 0.1). In order to determine the origin of this phenomenon we cloned the canine homologue of the AT1 AII receptor. Expression of this cDNA in COS-7 cells indicated a low affinity of DuP753 for the cloned receptor (KD = 92 nM). The predicted amino acid sequence is highly homologous to other mammalian AT1 receptors; sequence comparisons suggest the pharmacological difference may be the result of a threonine residue in position 163 in the IVth transmembrane domain.
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