The destruction of oxytocin and vasopressin by the aminopeptidases in sera from pregnant women

Ctstine Aminopeptidase in Normal and Complicated Pregnancies

“…It was not present in the non-pregnant female or in the human fetus. Page et al (1961) showed the extract contained two cystine aminopeptidases (CAP1 and CAP2) and one leucine aminopeptidase (LAP); the activity of the latter did not increase in pregnancy (Glendening et al, 1965).…”