Benzylamine oxidase activity in rat embryo and placenta at organogenesis

Benzylamine oxidase, characterized by its sensitivity to semi-carbazide (1 X 10(-2) mol/l) inhibition and its insensitivity to deprenyl (4 X 10(-4) mol/l) inhibition, is present in rat placenta during days 10-15 of the gestation period and in the embryo at days 11-15. The activity represents a substantial part of the overall activity observed with p-chlorobenzylamine as substrate. A much higher activity is present in the placenta than in the embryo.