Summary
The ‘plasmin-like’ enzyme previously demonstrated in gastric vein blood is studied
further in a series of experiments using gel filtration chromatography. By comparison
with purified enzymes it is identified as plasmin. Its non-identity to trypsin is
also established. The ‘plasmin-like’ activity previously demonstrated in the peripheral
blood, following gastric compression at laparotomy, is also studied in a similar way
and shows the same characteristics. These results confirm the view that plasmin present
in the peripheral veins of these patients has been released from the stomach.