Gel image of PCR products for Kainate receptors in taste tissues. PCR products for GluR7, KA1 and KA2 were observed in pooled taste buds from fungiform (FF) and circumvallate (CV) papillae but not in non taste epithelium (NT). Brain (BR) was used as a control. Bands are for the expected size for GluR5 (549 bp), GluR6 (498 bp), GluR7 (441 bp), KA1 (487 bp) and KA2 (210 bp). Left lane indicates a 100-bp ladder.