Mizutani S, Sakura H, Inamoto Y, Noto H, Kawashima Y
Nihon Sanka Fujinka Gakkai Zasshi. 1982 Apr;34(4):545-7.
The inactivation of oxytocin and angiotensin II by retroplacental serum and placental leucine aminopeptidase (P-LAP), which had been highly purified from retroplacental serum, was demonstrated using biological methods.