the treatment of spinal slices with low concentrations of enzymes and mechanical dissociation yielded isolated neurons that were sensitive to excitatory amino acids ( glutamate , kainate , quisqualate and n-methyl-d-aspartate ( nmda ) , inhibitory amino acids ( gamma-aminobutyric acid ( gaba ) , glycine ) and peptides ( substance p , calcitonin gene-related peptide ( cgrp ) .
C0243046
excitatory amino acids
C0002520
amino acids