Flat mounts of cone photoreceptors in wild type, cone-specific p85α−/−, Akt1−/−, Akt2−/−, and Akt3−/− mice. Shown is PNA (red) and anti-cone arrestin (p85α) or anti-cone Tα (green) immunofluorescence staining of retinal whole mounts from WT, knock-out mice (cone specific 85α, global Akt1, Akt2, and Akt3). For a control, primary antibodies were omitted.