Robuta

https://elifesciences.org/articles/91864 Inhibition of the serine protease HtrA1 by SerpinE2 suggests an extracellular proteolytic pathway... An extracellular proteolytic pathway involving the serine protease HtrA1, its inhibitor SerpinE2, and the transmembrane proteoglycan Syndecan-4 control... serine protease htra1