The activities of the Escherichia coli MalK protein in maltose transport, regulation, and inducer exclusion can be separated by mutations.
Kühnau S, Reyes M, Sievertsen A, Shuman HA, Boos W. The activities of the Escherichia coli MalK protein in maltose transport, regulation, and inducer exclusion can be separated by mutations. J Bacteriol. 1991 Apr; 173(7):2180-6.