The invention relates to cell-free receptor binding assays which permit the binding behavior of receptor proteins in the cell membrane toward natural or artificial ligands to be investigated. This entails the particular receptor being linked to a suitable carrier molecule, preferably the heavy chain of an immuno- globulin, and being bound via the carrier, with retention of its biological property, to a suitable solid phase.
CELL-FREE RECEPTOR BINDING ASSAYS, THE PRODUCTION AND USE THEREOF