Fig. 3. Numbers of ENS cells in the gut of RET S697A mutant mice. ENS cells were stained with cuprolinic blue and cell numbers were counted at each region of the small intestine (A) and the colon (B). The mean was calculated from ten views of each section of the intestine from four mice at P12. ^*P<0.01 compared with wild-type mice. Ho, homozygotes.