Enamel matrix proteins in rat mandibular incisors on day 30. Enamel matrix proteins were sequentially extracted from secretory-stage enamel on day 30 and analyzed by Western blotting with specific antibodies for enamelin (A), amelogenin (B), and ameloblastin (C). D: Densitometric quantification revealed a significant increase (2.12-fold ± 0.02) of enamelin adsorbed to the enamel crystals (PBS fractions) in BPA-treated rats (P = 0.02). All data are means ± SEM (n = 3). ∗P < 0.05. IHC analysis of enamelin (E), amelogenin, (F), ameloblastin (G), and serum albumin (H). Scale bars: 70 μm (G); 200 μm (H). En, enamel; Am, ameloblasts.