Fig. 2.

Fluorescence microscopic examination of sections of lung (left column), kidney (middle column) and cartilage (right column) with filter set U-MWG2. The figures in the lower row are magnified images. Intense fluorescence is emitted from cell-like residues. Auto-fluorescence-emitting residues in kidney are arranged in rows, which look like renal tubules. In cartilage, auto-fluorescence is only detected within the lacunae. Scale bars: 300 μm (upper row) and 100 μm (lower row) for lung and kidney; 200 μm for cartilage.