Figure 5: Defects in enamel formation of ameloblastin null mice. SEM analysis of 8-wk-old incisor cross sections from heterozygote and homozygote mice. Note the lack of a true enamel layer on the homozygous mutated Ambn incisor. E, enamel; D, dentin; P, pulp. (D) SEM analysis of incisor. E, enamel; D, dentin; P, pulp; dE, defective enamel. This figure was originally published in: Fukumoto et al. J. Cell Biol. 167 (5):973-983, 2004. D01/10.1083/jcb.200409077.