Fig. 9. Reduced kidney size in RET S697A mutant mice. (A) The weight of the kidney as a percentage of total body weight was determined in wild-type and mutant newborn mice (P3). Means and standard errors (error bars) were calculated from 23 wild-type, 55 heterozygous and 20 homozygous mice. ^*P<0.01 compared with wild-type mice. (B) Hematoxylin/Eosin staining of wild-type and mutant kidneys. Kidney of mutant mice at 2 months of age shows normal histology.