A non-essential amino acid and a major inhibitory transmitter in the central nervous system, but not as widespread as gamma amino butyric acid. Binds to receptor sites on alpha (α) motoneurons.
See Alpha (α) motoneuron, Amino acids, Aspartate (or aspartic acid), Gamma amino butyric acid (GABA), Glutumate (or glutamate), Neurotransmitters