An active MASP-1 SP domain (IMAGE) Aarhus University Caption Researchers from Aarhus University have discovered that ITIH4 inhibits proteases in the innate immune system via an unknown mechanism. Figure: Rasmus Kjeldsen Jensen. Credit Rasmus Kjeldsen Jensen, Aarhus University Usage Restrictions Image may be used only to illustrate the research described in the accompanying release License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.