The O-specific side-chain of the lipopolysaccharide from Escherichia coli O127a:H- (O127a:4932-53) has been investigated using 2D NMR spectroscopy, methylation analysis, and partial solvolysis with anhydrous hydrogen fluoride as the principal methods. It is concluded that the polysaccharide is composed of tetrasaccharide repeating-units having the following structure. →2)-α-L-Fucp-(1→2)-β-D-Galp-(1→3)-α-D-GalpNAc-(1→3)-α-D-GalpNAc-(1→ The polysaccharide contains approximately one mole of O-acetyl groups per repeating unit distributed over several positions.

• Compound ID: 987
  

  -2)-a-L-Fucp-(1-2)-b-D-Galp-(1-3)-a-D-GalpNAc-(1-3)-a-D-GalpNAc-(1-

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  Structure type: polymer chemical repeating unit
  Compound class: O-polysaccharide, O-antigen
  Reference(s) to other database(s): GTC:G68080NF, GlycomeDB:3548
  
   
  
  Escherichia coli O127a
  CSDB ID 117352 (all data & tools)