The term "gab operon" is not widely recognized in established scientific or encyclopedic sources as a standardized biological concept. Accurate information is not confirmed.
The phrase may be intended to refer to a genetic operon involved in the metabolism of gamma-aminobutyric acid (GABA), potentially in bacteria such as Escherichia coli, where genes like gabP, gabT, and gabD are known to participate in GABA degradation. In some contexts, the cluster of these genes might be informally referred to as the "gab system" or "gab pathway," but the designation as an operon—specifically a co-transcribed and co-regulated unit—has not been consistently documented in peer-reviewed literature.
Due to the lack of consensus and verifiable references, the term "gab operon" cannot be confirmed as a formally defined genetic structure. Usage may vary or appear in preliminary or non-peer-reviewed scientific discussions.