PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1682135-5 1991 These new observations suggest that somatostatin and epinephrine negatively modulate insulin availability through a guanine nucleotide binding protein-mediated step in insulin synthesis before the exocytotic pathway. Guanine Nucleotides 116-134 insulin Homo sapiens 85-92 1682135-5 1991 These new observations suggest that somatostatin and epinephrine negatively modulate insulin availability through a guanine nucleotide binding protein-mediated step in insulin synthesis before the exocytotic pathway. Guanine Nucleotides 116-134 insulin Homo sapiens 168-175