Binds transducins (By similarity). Homodimer. Interacts (via PH domain) with MYO1C. Interacts (via PH domain) with MYO7A. Membrane-associated. Highly expressed in the outer segments of photoreceptor cells, both in rods and cones (By similarity). Localizes to the apical juxta-nuclear Golgi region of the cytoplasm (PubMed:20301200). Highly expressed in retina and brain. In retina, abundantly expressed in photoreceptors. Isoform 4 is the predominant isoform expressed in mature olfactory receptor neurons and vestibular and cochlear hair cells. Also expressed in cells with possible sensory function, including peripheral retinal ganglion cells, cochlear interdental cells, and neurons of the circumventricular organ (at protein level). Mice appear normal at birth with no obvious behavioral or growth abnormalities nor overt sensory deficits. At 6 months and 1 year of age, mice display normal retinal histology and normal response in electroretinograms.