AGTPBP1 and ablepharon macrostomia syndrome: Immunohistochemical analyses of cerebellum specimens from AMS and Nna1 KO mice revealed that the number of PCs decreased from P21; however, no significant differences in CCP1 staining intensity in a single PC were found between WT and AMS mice at P21 and P28 (Figure 1B), indicating that the amount of CCP1 protein is not affected by the vulnerability of PCs.