both the nonoccupied and in vitro occupied forms of the receptors interacted with heparin-sepharose but with varying strength , as determined by ligand binding assays or an enzyme-linked immunosorbent assay based on a monoclonal antibody against the steroid- and dna-binding mr approximately 94,000 glucocorticoid receptor protein .
C1517880
ligand binding
C1417249
mr