AP5B1 and membranous glomerulonephritis: In contrast, the AP5 signal was very weak when human podocytes were incubated with normal urine (Figure 6E), urine from a patient with minimal change disease (Figure 6K), urine from a patient with membranous nephropathy (Figure 6M), bovine serum albumin (Figure 6B) and RPMI 1640 (Figure 6C), and the signal was not significantly influenced after the addition of the blocking antibody (Figure 6F, Figure 6L, Figure 6N, Figure 6D, respectively).