chbG:Quickview
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| Quickview | Gene | Gene Product(s) | Expression | Evolution | On One Page |
| References | Suggestions |
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| Standard Name |
|---|
| Gene Synonym(s) |
| Product Desc. |
| Product Synonyms(s) |
| Knock-Out Phenotype |
| Regulation/Expression |
| Regulation/Activity |
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Notes
The chb operon is induced by N,N'-diacetylchitobiose. The chb operon was previously thought to encode a cryptic cel operon for a cellobiose degradation system. The Cel+ phenotype is due to mutations making expression chitobiose-independent, but a fully induced operon did not support growth on cellobiose, implying a mutation altering the substrate specificity is needed; several candidate mutations were noted in Genbank, but not proven to alter the specificity of the system (Keyhani, 1997). In contrast, a later study claim that mutations making the operon expression high-level constitutive by chbR and nagC mutations are sufficient for the Cel+ phenotype and that no mutations altering substrate specificity are required (Kachroo, 2007).[1]
References