Figure 2: BS SEM micrographs of Brtl/+ mandibular molars. (a) Low resolution micrograph showing overall morphology of the tooth. Note an area of globular dentin (GD) in the cervical root. (b) A micrograph of a molar from a different animal also featuring GD. (c) Closeup of the area containing GD from (a). Note the variations in the degree of mineralization. B: bone, D: dentin, E: enamel, and P: pulp. Asterisks mark undermineralized areas.