in an attempt to identify dorsal root ganglion ( drg ) neurons that use glutamic acid as a neurotransmitter , [ 3h ] d-aspartate ( [ 3h ] d-asp ) was chosen as a marker , since it is a metabolically inert amino acid known to be taken up by the same affinity mechanism as l-aspartate and l-glutamate .
C0061472
glutamic acid
C0002520
amino acid