1.   The amount of urokinase type plasminogen activator antigen in the samples was calculated from an eight point standard curve of urokinase type plasminogen activator.

2.   Tissue type plasminogen activator antigen was measured essentially as described by Rijken et al.

3.   Absolute quantities of tissue type plasminogen activator antigen in the samples were calculated from an eight point standard curve of tissue type plasminogen activator.

4.   For urokinase type plasminogen activator antigen in the stomach the opposite was observed.

5.   In fast, we found well differentiated carcinomas to contain significantly less urokinase type plasminogen activator antigen compared with poorly differentiated carcinomas.