Multiple sequence alignment (CLUSTAL) of the deduced sequences of, from top to bottom, RfbJ of Synechocystis sp. strain PCC6803 (accession no. S77381), ORF10X9 of S. flexneri (accession no. P37787), GltB of L. monocytogenes (accession no. AF033015), RfbJ of S. flexneri (accession no. P37786), and a putative glycosyltransferase of Archaeoglobus fulgidus (accession no. AE001078). The underlined segments represent predicted transmembrane regions.