Source: https://www.researchgate.net/publication/221808681_On_the_cutting_edge_of_proprotein_convertase_pharmacology_From_molecular_concepts_to_clinical_applications/fulltext/021dabac0cf2115c5539da7a/On-the-cutting-edge-of-proprotein-convertase-pharmacology-From-molecular-concepts-to-clinical-applications.pdf