Question: 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?
Sentence (from "Gamma-Aminobutyric acid"): "gamma-"Aminobutyric acid (γ-Aminobutyric acid) (GABA ) is the chief inhibitory neurotransmitter in the mammalian central nervous system.
Relevant evidence: Yes