PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1402923-5 1992 In the presence of either 36 mM or 136 mM Na+, [3H]DA uptake was optimal with 2 mM Mg2+, 1 mM K+, or 1 mM Ca2+. Tritium 48-50 opioid receptor, kappa 1 Rattus norvegicus 94-102 1402923-5 1992 In the presence of either 36 mM or 136 mM Na+, [3H]DA uptake was optimal with 2 mM Mg2+, 1 mM K+, or 1 mM Ca2+. amsonic acid 51-53 opioid receptor, kappa 1 Rattus norvegicus 94-102