SEARCH Articles Figures Tables 2- aminobutyrate Aminobutyric Aminobutyric acid GABA GABA (gamma-aminobutyric Gamma acid Gamma aminobutyric Gamma-aminobutyrate Gamma-aminobutyric acid Gamma-aminobutyric acid (GABA GABAa receptor Gamma-aminobutyric acid (GABA sleep