AMINO ACID SENSITIVITY OF THE DACTYL CHEMORECEPTORS OF CARCINIDES MAENAS

Abstract

1. Dactyl chemoreceptors were electrophysiologically demonstrated in Carcinides maenas, Libinia emarginata, Callinectes sapidus, and Paguris pollicaris. 2. In Carcinides the receptors respond to a boiled dialysate of Mytilus, and to 1-glumatic acid at dilutions in excess of 5.0 x 10-5 M. Derivatives of glutamic acid and other amino acids are less stimulatory. 3. Optical isomers of glutamic acid, aspartic acid and leucine are distinguished by small populations of Carcinides dactyl receptors.