PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 11206183-6 2001 These results suggest that alpha1D-adrenoceptors play a significant role in the alpha1-adrenoceptor-agonist-induced contraction of rat thoracic aorta and rabbit iliac artery, and that clonidine and tizanidine interact with the alpha1D-adrenoceptor subtype as competitive antagonists in rat thoracic aorta. Clonidine 184-193 alpha-1D adrenergic receptor Oryctolagus cuniculus 27-47