The expressed mu OR1 recognized tested opiate drugs and opioid peptides in a sodium- and GTP-sensitive fashion with affinities virtually identical to those displayed by the rat mu opiate receptor .
O O B-GeneOrGeneProduct I-GeneOrGeneProduct O O B-ChemicalEntity O O B-ChemicalEntity I-ChemicalEntity O O B-ChemicalEntity O B-ChemicalEntity O O O O O O O O O O B-OrganismTaxon B-GeneOrGeneProduct I-GeneOrGeneProduct I-GeneOrGeneProduct O