Receptor sites for amino acids in the facial taste system of the channel catfish |
| |
Authors: | Sandra Wegert John Caprio |
| |
Affiliation: | Department of Zoology and Physiology, Louisiana State University, Baton Rouge 70803-1725. |
| |
Abstract: | 1. Receptor sites for different amino acids in the facial taste system of the channel catfish, Ictalurus punctatus, were determined from in vivo electrophysiological cross-adaptation experiments. 2. Relatively independent receptor sites were indicated for L-proline, D-proline, D-arginine, L-histidine and L-lysine, as well as those previously reported for L-alanine, L-arginine and D-alanine. 3. The functional isolation of two nerve twigs that were more responsive to D-alanine than to L-alanine or to other test stimuli provided further evidence for the existence of D-alanine sites that are independent from those to L-alanine. 4. Under all cross-adaptation regimes, the taste responses to the majority of test stimuli were reduced. Various possible mechanisms accounting for this generalized reduction in action potential activity during adaptation are discussed. |
| |
Keywords: | Taste Amino acids Cross-adaptation Catfish Electrophysiology |
本文献已被 SpringerLink 等数据库收录! |
|