Dihydroxyacetone binding subunit of the dihydroxyacetone kinase, which is responsible the phosphoenolpyruvate (PEP)-dependent phosphorylation of dihydroxyacetone via a phosphoryl group transfer from DhaL-ATP. dihydroxyacetone + phosphoenolpyruvate = dihydroxyacetone phosphate + pyruvate Polyol metabolism; glycerol degradation. Homodimer. The dihydroxyacetone kinase complex is composed of a homodimer of DhaM, a homodimer of DhaK and the subunit DhaL. Induced by dihydroxyacetone via the DhaQ-DhaS complex. Truncated N-terminus.