MASP2 and hemolytic-uremic syndrome: Additionally, in peritubular capillaries and renal arteries, MASP-2 was detected in only 22% 2/9 of cases from patients with COVID-19 respectively, but could otherwise only be detected in renal arteries of HUS and in peritubular capillaries in HUS and ATI groups and not at all in the Ctrl biopsies (Figures 5C–F).