Representative western blotting analysis and densitometry of non-ligated (right; R) and ligated (left; L) carotid arteries from WT and Hoxa4 KO mice at 1 week after ligation (WT: n=6, Hoxa4 KO: n=7). *P<0.05, **P<0.01, by two-way ANOVA with Sidak's correction. 