Visual arrestin antibody (E-3, 1:100, Cat. # SC-166383) and corresponding Alexa Fluor Plus 488-IgG (H + L) (1:200, Cat. # A21038) was also used to confirm photoreceptors co-localization. For NRL-GFP mice cryosection, anti-mCherry rabbit antibody (1:250, Novus Biologicals, ...