Fig. 4. Numbers of GC-D⁺ glomeruli. (A) Graph of glomerular size in adult GCD-ITL mice (n=8 bulbs). The longest diameter of a given GC-D⁺ glomerulus was measured. Three classes of glomeruli can be distinguished: large, 236.2±41.4 µm (n=24); medium, 132.9±20.2 µm (n=53); small, 66.6±10.9 µm (n=75). (B) Graph of developmental series of the number of GC-D⁺ glomeruli per bulb, at 2 weeks postnatal (2 wk; n=9 bulbs), 4 wk (n=12), 6 wk (n=10) and 12 wk (n=14). (C) Graph of numbers of glomeruli in NP2- homozygous, GCD-ITL homozygous mice compared to GCD-ITL homozygous (`wild-type') mice.