PLA2R1 and kidney disorder: Diseased kidney biopsy samples were obtained from eleven newly diagnosed PMN patients with positive anti‐PLA2R autoantibody in serum, histopathological diagnosis of MN stage I‐II, and without other kidney diseases; control (Ctrl) samples were obtained from seven subjects with normal kidney function and without histopathological abnormalities in selected kidney biopsy tissue (Figure 1A).