PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 13495-2 1977 When given in equipotent beta1 blocking doses, the nonselective blocker propranolol and the beta1 selective blocker metoprolol differ markedly as regards inhibition of adrenaline induced beta2 mediated vasodilatation. Metoprolol 116-126 potassium calcium-activated channel subfamily M regulatory beta subunit 2 Homo sapiens 187-192