https://pubmed.ncbi.nlm.nih.gov/17928292/
An undecaprenyl phosphate-aminoarabinose flippase required for polymyxin resistance in Escherichia...
Modification of lipid A with the 4-amino-4-deoxy-L-arabinose (L-Ara4N) moiety is required for resistance to polymyxin and cationic antimicrobial peptides in...
phosphate