Seminal progastricsin
Lundquist and Seedorff [1] demonstrated the presence of a zymogen in human seminal fluid, that could be activated into an active enzyme by acidification to pH 2. As the enzyme was purified, it became evident that it was in fact equivalent to the minor gastric enzyme originally named as progastricsin (EC 3.4.23.3) [2–6].This report provides a short review on the similarities and differences between