2.7.8.43 EDTA - 21 2.7.8.43 LpxT role for LpxT in the reduction of enzyme EptA activity, the transcriptional regulation of lpxT gene is PmrA-independent. PmrA-dependent inhibition of LpxT is required for phosphoethanolamine decoration of lipid A 206264 2.7.8.43 LpxT role for LpxT in the reduction of enzyme EptA activity. Loss of Salmonella lpxT greatly increases modification of lipid A through enzyme EptA. LpxT catalyses the phosphorylation of lipid A at the 1-position 206264 2.7.8.43 polymyxin resistance to polymyxin for the enzyme is realized by oxidoreductase DsbA 217825