Failure of3H-serine to induce radioactivity in presumed glycinergic retinal neurons

Summary ³H-serine does not label retinal neurons selectively when injected intraocularly in rabbits, as would have been expected if it had been converted to neutrotransmitter glycine. The reason is unknown, but one possibility is that the conversion was blocked during the conditions of the experiment.This work was supported by the Swedish Medical Research Council (project No. 04X-2321) and the Faculty of Medicine, University of Lund.