<i>A</i>. <i>baumannii</i> K locus genes determine major surface polysaccharides, including capsular exopolysaccharide and an LPS glycoform.

<p><b>A</b>. The K locus from <i>A</i>. <i>baumannii</i> strain 17978 (KL3 in [<a href="http://www.plospathogens.org/article/info:doi/10.1371/journal.ppat.1004691#ppat.1004691.ref025" target="_blank">25</a>]) with genes analyzed in this study indicated. Black, gray, and white shading indicate distinct modules described in the text. <b>B</b>. India ink staining of bacteria grown to early post-exponential phase. Scale bar: 10μm. <b>C</b>. Analysis of polysaccharides in early post-exponential phase cell lysates separated by SDS-PAGE and stained with alcian blue. Numbered black arrows and white arrow indicate the principal polysaccharides described in the text. M, BioRad prestained MW marker. WT/mTn7T denotes the presence of the miniTn7 insertion without cloned gene.