Retinal G-substrate, potential downstream component of NO/cGMP/PKG pathway, is located in subtype of retinal ganglion cells and amacrine cells with protein phosphatases.
Nakazawa T, Endo S, Shimura M, Kondo M, Ueno S, Tamai M. Brain Res Mol Brain Res. 2005 Apr 27; 135(1-2):58-68.