although the dissociation constant of the cytoplasmic estrogen receptor in the immature and mature epididymis and accessory sex organs remains constant during development ( approximately 0.1 nm ) , the number of available cytoplasmic estrogen binding sites declines from about 160 fmoles/mg cytosol protein in the immature rabbit to about 40 fmoles/mg cytosol protein in the adult animal .
C0206587
cytoplasmic
C0010834
cytoplasmic