GNRH1 and urinary bladder carcinoma: Analysis of the typical displacement of radiolabeled [D-Trp6] LHRH and the Scatchard plots of the specific binding data in the 10 receptor positive bladder cancer specimens revealed that LHRH receptors had a mean dissociation constant (Kd) of 4.98 nM (range, 3.61 to 6.85 nM).