PLA2R1 and membranous glomerulonephritis: Within the kidney, podocytes selectively express an essential set of proteins, such as the central slit diaphragm proteins nephrin, neph1, and podocin, as well as the podocyte foot process proteins PLA2R1 and THSD7A (Figure 9) that in the recent two decades have been identified due to their target function in membranous nephropathy, an autoimmune podocyte injury.