Antagonist/agonist-preferring a-adrenoceptors or a1/a2-adrenoceptors?

@inproceedings{Tanaka1980AntagonistagonistpreferringAO,
  title={Antagonist/agonist-preferring a-adrenoceptors or a1/a2-adrenoceptors?},
  author={Toyoichi Tanaka},
  year={1980}
}
Abstract Yohimbine and some stereoisomeric alkaloids inhibited the binding of 3 H-clonidine and 3 H-WB-4101 to rat cerebral cortex membranes. Rauwolscine and yohimbine had much higher affinity to the 3 H-clonidine than to the 3 H-WB-4101 site, whereas the reverse was true for corynanthine. The results indicate that the 3 H-clonidine site is an α 2 -adrenoceptor and not an agonist-selective site whereas the 3 H-WB-4101 site is an α 1 -adrenoceptor and not an antagonist-selective site. 

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