Immunolocalization of membrane-associated proteins (S-opsin, M-opsin, GRK1, and Gαt2) in the retinas of TUDCA or vehicle-injected Lrat–/– and WT mice. P18 Lrat–/– and WT retinas were stained with antibodies against S-opsin, M-opsin, GRK1, and Gαt2 (green). Nuclei were stained with DAPI (blue). Red arrows indicate GRK1 signals in the WT (both vehicle and TUDCA treated) COS while white arrows indicate reduced Gαt2 signals in the Lrat–/– COS. Scale bar = 10 μm.