O Antigens

The lipopolysaccharide-protein somatic antigens, usually from gram-negative bacteria, important in the serological classification of enteric bacilli. The O-specific chains determine the specificity of the O antigens of a given serotype. O antigens are the immunodominant part of the lipopolysaccharide molecule in the intact bacterial cell. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed)

Also Known As:

O Antigen; O Antigen, Bacterial; O-Antigens; O-Specific Polysaccharide; Antigen, Bacterial O; Antigen, O; Antigens, O; Bacterial O Antigen; O Specific Polysaccharide; O Specific Polysaccharides; Polysaccharide, O-Specific; Polysaccharides, O-Specific; O-Antigen; O-Specific Polysaccharides

Carbohydrates: 22023
- Polysaccharides: 15383
  - Bacterial Polysaccharides: 50
    - Lipopolysaccharides: 27188
      - O Antigens: 472
Lipids: 114793
- Lipopolysaccharides: 27188
  - O Antigens: 472
Biological Factors: 2472
- Antigens: 143924
  - Bacterial Antigens: 807
    - Bacterial Polysaccharides: 50
      - Lipopolysaccharides: 27188
        O Antigens: 472
- Biological Toxins: 20
  - Bacterial Toxins: 814
    - Endotoxins: 14335
      - Lipopolysaccharides: 27188
        O Antigens: 472

E. coli O16 O-antigen

Bio-Agent Context: Research Results