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CPS phenotypes of A. baumannii wildtype, wzi and itrA1 mutants. Purified capsular polysaccharide from A. baumannii cells and supernatants. Samples were visualized by SDS-PAGE and stained with Alcian blue. Cell fraction represents the proportion of CPS attached to the cell surface, while polysaccharide in the supernatant represents CPS shed from the cell surface. Strain names are shown above each well. Original uncropped gel images are provided in Fig. S3.
