PTS Lactose-N,N'-Diacetylchitobiose Family

The PTS Lactose-N,N’-Diacetylchitobiose (Lac) Family (TC# 4.A.3) includes several sequenced lactose porters of Gram-positive bacteria, as well as the Escherichia coli and Borrelia burgdorferi N,N'-diacetylchitobiose (Chb) porters. It is part of the PTS-GFL superfamily. The former can transport aromatic β-glucosides and cellobiose, as well as Chb. However, only Chb induces expression of the chb operon.

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