... 269) 427[26,27]. Then, the biosynthesis of the core region of LPS from A. baumannii strain ATCC 19606 should proceed with the introduction of a third Kdo residue to O-5 of the secondKdo. This ... mechanism of the transfer of the third Kdo residue has not yet beenidenti®ed.In addition to the work on the determination of the chemical and antigenic structures of O-speci®c polysaccha-rides from ... insights in structure, genetics andbiosynthesis of LPS. Here, the structures of the carbohy-drate backbones of the LPS from A. baumannii strainATCC 19606 are reported.Correspondence to O. Holst,...