title: Hydrodynamic properties of a [3H]etorphine macromolecular complex from the rat brain.
mesh_terms: D000818:Animals; D001921:Brain / Q000378:metabolism*; D002499:Centrifugation, Density Gradient; D005048:Etorphine / Q000378:metabolism*; D046911:Macromolecular Substances; D008970:Molecular Weight; D009019:Morphinans / Q000378:metabolism*; D051381:Rats; D011957:Receptors, Opioid / Q000378:metabolism*
chemical_list: D046911:Macromolecular Substances; D009019:Morphinans; D011957:Receptors, Opioid; D005048:Etorphine