数据之源，洞见之始

Trianion of UDP-2,3-diacetamido-2,3-dideoxy-alpha-D-mannuronic acid arising from deprotonation of carboxylic acid and diphosphate functions." []

Trianion of UDP-2,3-diacetamido-2,3-dideoxy-alpha-D-glucuronic acid arising from deprotonation of carboxylic acid and diphosphate functions." []

In several strains, including the respiratory pathogens |FRAME: ORG-6217| |CITS: [19282284]| and |FRAME: TAX-520| |CITS: [11526328]| and the verocytotoxin-producing Escherichia coli O180 |CITS: [22730467]|, the O-antigen contains the modified sugar |FRAME: CPD-14608|.In the case of |FRAME: TAX-208964| (and other serotype O5 strains of |FRAME:ORG-5927|), the organism possesses two types of O-antigens, which were named the A-band and the B-band. |FRAME: CPD-14608| is only found in the latter |CITS: [8112851]|. In |FRAME: TAX-520| the sugar is part of the A-band trisaccharide |CITS: [11083787]|.This modified sugar is synthesized in an activated form as a UDP-linked sugar and is incorporated into the LPS by the action of an inverting glycosyltransferase. It is produced from |FRAME: UDP-N-ACETYL-D-GLUCOSAMINE| in 5 steps, catalyzed by enzymes whose genes are largely clustered in the genome. See |FRAME: PWY-7090|.