FIG. 8.

Electron micrographs of ultrathin sections of the hind limb soleus muscle (A and B) and the kidney cortex (C and D) from 6-week-old wild-type (+/+) and homozygous (−/−) animals. In panels A and B, the basement membrane of the myocyte is marked by arrows. em, endomysium; s, sarcomer. In panels C and D, the basement membrane of a proximal tubule is marked by solid arrows, and the endothelial basement membrane is indicated by open arrows. Endothelial cells are indicated by asterisks. Bar, 0.25 μm.