IMMUNOHISTOCHEMICAL LOCALIZATION OF GABA IN CHAMELEON RETINA (CHAMALEO-CHAMALEO)

We used a policlonal antiserum against GABA and demonstated GABA-immun oreactivity (GABA-IR) in several populations of amacrine cells in the inner nuclear layer (INL), and other cells in the inner plexiform laye r (IPL) of the central and peripheral retina of the chameleon. Horizon tal cells do not contain GABA-IR and the chameleon retina is therefore an exception among non-mammals. GABA-IR was not seen in cell bodies i n the position of photoreceptor, bipolar and interplexiform cells sugg esting that GABA is not involved in synaptic transmission in the outer plexiform layer of chameleon retina. (C) 1996 Academic Press Limited