[PAR] [TLE] Gamma-Aminobutyric acid [SEP] "gamma-"Aminobutyric acid (γ-Aminobutyric acid) (GABA ) is the chief inhibitory neurotransmitter in the mammalian central nervous system.  Its principal role is reducing neuronal excitability throughout the nervous system.  In humans, GABA is also directly responsible for the regulation of muscle tone. [PAR] [TLE] Gab operon [SEP] The "gab" operon is responsible for the conversion of γ-aminobutyrate (GABA) to succinate.  The "gab" operon comprises three structural genes – "gabD", "gabT" and "gabP" – that encode for a succinate semialdehyde dehydrogenase, GABA transaminase and a GABA permease respectively.  There is a regulatory gene "csiR", downstream of the operon, that codes for a putative transcriptional repressor and is activated when nitrogen is limiting.
[PAR] [TLE] Gamma - Aminobutyric acid [ SEP ] " gamma-"Aminobutyric acid ( γ - Aminobutyric acid ) ( GABA ) is the chief inhibitory neurotransmitter in the mammalian central nervous system . Its principal role is reducing neuronal excitability throughout the nervous system . In humans , GABA is also directly responsible for the regulation of muscle tone . [PAR] [TLE] Gab operon [ SEP ] The " gab " operon is responsible for the conversion of γ - aminobutyrate ( GABA ) to succinate . The " gab " operon comprises three structural genes – " gabD " , " gabT " and " gabP " – that encode for a succinate semialdehyde dehydrogenase , GABA transaminase and a GABA permease respectively . There is a regulatory gene " csiR " , downstream of the operon , that codes for a putative transcriptional repressor and is activated when nitrogen is limiting .
The Gab operon is responsible for the conversion of γ-aminobutyrate to succinate, what is the  is the chief inhibitory neurotransmitter in the mammalian central nervous system, called?
The Gab operon is responsible for the conversion of γ - aminobutyrate to succinate , what is the is the chief inhibitory neurotransmitter in the mammalian central nervous system , called ?
GABA
GABA