Figure 3. Alpha₁ GABA_A (α1), GABA_B (B) and rho₁ GABA_C (ρ1) receptor protein distribution in chick cornea (C) and retina (R). With antibodies for alpha₁ GABA_A, GABA_B and rho₁ GABA_C receptors, immunoreactivity was observed in corneal epithelium cell for alpha₁ GABA_A (α1) and rho₁ GABA_C (ρ1; yellow arrow), but not for GABA_B receptor (B) in the cornea (C). In the retina (R), immunoreactivity was found in the inner plexiform layer, outer plexiform layer, inner nuclear layer, and ganglion cell layer for alpha₁ GABA_A (α1), GABA_B (B) and rho₁ GABA_C (ρ1) receptors, corresponding to previous reports [6-11,15]. There was essentially no immunoreactivity observed for the negative controls (N.C). The scale bar is 10 µm. Photographs were taken at 40× magnification.