PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 2670868-6 1989 The results demonstrate 1) that ractopamine has concentration-dependent effects on adipose tissue insulin sensitivity and responsiveness and 2) that these effects may be mediated, in part, through beta-adrenergic receptors. ractopamine 32-43 insulin 2 Rattus norvegicus 98-142