The binding of [3H]-clonidine, [3H]-idazoxan and [3H]-yohimbine to rabbit forebrain and kidney membranes was compared. 2. Yohimbine bound exclusively to adrenergic sites, idazoxan to non-adrenergic sites and clonidine to both non-adrenergic and adrenergic sites. 3. Differences were observed between the ligands not only in binding at adrenergic and non-adrenergic sites but also between the non-adrenergic binding of [3H]-clonidine and [3H]-idazoxan. 4. However, no tissue specific differences were found.
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Hamilton et al. (1991) studied this question.
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