SEARCH Articles Figures Tables Amino acid as neurotransmitters Amino acid central nervous system neurotransmitters Amino acid neurotransmitters excitatory Amino acid neurotransmitters inhibitory Excitatory Amino Acid Neurotransmitters Glutamate Inhibitory Amino Acid Neurotransmitters Glycine Neurotransmitter amino acid decarboxylation Neurotransmitter receptors amino acid