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 "Olfactory bulb mitral cell"): Support for the second hypothesis comes primarily from research in zebrafish (where mitral and tufted cells cannot be distinguished).
Relevant evidence: No