Etude des constantes de liaison entre les oestrogenes et 1'α1‐foetoproteine de rat

Abstract
The binding constants of the α1-foetoprotein of the rat embryo serum for oestrone and oestradiol-17β have similar values, i.e. 1 × 108 M−1 in average at 25°. There is probably one binding site per mole of binding protein. The high α1-foetoprotein concentration in the rat embryo serum at 17–19 days of pregnancy explains the exceptionally high levels of fixation of the phenolsteroids by this serum.