studies have been made on the reactions of 34 neurones from the accessory olfactory bulb of the frog rana temporaria to stimulation of the receptors in the vomeronasal organ by amino acids ( l-alanine , l-aspartic acid , l-valine , l-glytamic acid , glycine , l-proline , l-serine ) , carboxylic acids ( acetic , glutaric , isovaleric , propionic and succinic acids ) at a concentration 10 ( -4 ) m , as well as by `` '' rinsing '' '' the frog 's skin .
C0002520
amino acids
C0001898
l-alanine