Kinetic binding studies of [125I] MIH to the hepatopancreas membranes of female C. sapidus at ovarian stage 3 demonstrate receptor/ligand typical and specific binding. Five membrane preparations were pooled and tested. A) Saturation curve; B) Displacement curve. [125I] MIH binding sites were displaced with unlabelled rMIH (closed circles) or unlabelled CHH (open circles). The data are presented as mean ± SEM of the triplicates.