Fig. 16.

SEM, TEM and immunohistochemistry of the human BM a SEM of the TCL at the basal turn. Flat cells have long cytoplasmic processes and small protrusions. b, c TEM of tangentially sectioned human BM at Hensen’s cells at second turn. Osmium-stained fibrils or “acoustic strings” are observed between the TCL and the basement membrane. d Integrin expression in lamina nerve fibers and BM. e Collagen II and IV expression in the BM. f TCL expression of fibronectin. Bars (d) 100 μm, (e) 50μm, f 25 μm