Fig. 2

a There were positive blue signals in both the glomerular cells and Bowman’s capsular epithelial cells in Berlin blue staining (left-upper panel). The positive blue signals were prominent in the tubular cells (right-upper panel). There were no apparent positive blue signals in the normal human kidney sections (lower panels). Scale bars, 50 μm. b The results of an electron microscopic study revealed the thinning of the glomerular basement membrane without any immune complexes. Scale bar, 500 nm