International Units and Enzyme Activity

Thrombin | Urokinase | t-PA | Factor Xa and X | Plasminogen and Plasmin | Protein C

The enzyme activity expressed as katal is related to the type of substrate, to the nature of the enzyme and to the experimental conditions. In the following paragraphs, a tentative correlation between the different types of units and the enzyme activity with Chromogenix substrates is reported. The purpose is to help the researchers in developing chromogenic methods, by using such information as a starting point.

The conversion factors, have been taken from journal articles or from laboratory results within the Chromogenix R&D department, thus the consultation of such references or of the assay conditions reported in the kinetic tables is recommended.