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. 2002 Dec;70(12):6770–6778. doi: 10.1128/IAI.70.12.6770-6778.2002

FIG. 4.

FIG. 4.

Analysis of lipid A for the presence of aminoarabinose. Paper chromatography was performed on lipid A from PmrAc and PmrA-null Salmonella serovar Typhimurium, as well as lipid A from the four PMs mutants and two PmrA-regulated gene mutants identified in this study. The chromatograms were run with a solvent system of isopropanol-ethyl acetate-water (7:1:2). Yellow color upon development with ninhydrin is characteristic of 4-aminoarabinose (yellow color was converted to grey).