Fig. 11.
The structures of the LPS from the R. leguminosarum bv. viciae RBL5523 and its mutant 5808. The OPS for both RBL5523 and 5808 have the same structure as shown. The glycosyl residue that attached the OPS to Kdo III of the core region has not been determined but, based on the R. etli CE3 structure shown in Figure 1, is hypothesized to be the QuiNAc residue. The OPS is also highly O-acetylated (the location of the O-acetyl groups has not been determined). The LPS from the mutant 5808 differs from that of 5523 in that it is devoid of all GalA residues, that is, the circled residues in the structures shown.