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.[1][2] 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.