Fig. 1.

Transcript analysis for Enam and Odam (a) and AE2 and Cftr (b). a Levels of Enam during secretory-stage amelogenesis and Odam levels in maturation-stage amelogenesis are of the same order of magnitude as Actb. The X indicates that the measurements are present; however, the magnitude and standard error are bars not clearly apparent in the scale of this graph. b Note that the relative levels of AE2 and Cftr are of 2 orders of magnitude less than seen for Actb, Enam, and Odam. When comparing mid-late maturation stage amelogenesis to secretory-stage amelogenesis there was a significant upregulation of AE2 mRNA (2.9-fold) and Cftr mRNA (5.6-fold). All mRNA transcript levels were normalized to those of β-actin (represented on the y-axis).