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Pseudomonas aeruginosa Psl Is a Galactose- and Mannose-Rich Exopolysaccharide ^,

Department of Microbiology and Immunology, Wake Forest University School of Medicine, Winston-Salem, North Carolina,¹ Department of Microbiology, University of Washington, Seattle, Washington²

Received 21 April 2007/ Accepted 4 July 2007

The Pseudomonas aeruginosa polysaccharide synthesis locus (psl) is predicted to encode an exopolysaccharide which is critical for biofilm formation. Here we used chemical composition analyses and mannose- or galactose-specific lectin staining, followed by confocal laser scanning microscopy and electron microscopy, to show that Psl is a galactose-rich and mannose-rich exopolysaccharide.

Published ahead of print on 13 July 2007.

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