This image depicts proliferating supporting cells (yellow) in an eight-day-old mouse utricle, a balance organ of the inner ear, that was cultured for seven days with Epidermal Growth Factor and an inhibitor of Glycogen Synthase Kinase 3. Green labels Yes-assoicated protein, and red depicts β-catenin. For more information, see the article by Kozlowski et al. (pages 2618–2632).