Core oligosaccharide
![Core-OS Structure and Metabolic Pathways: oligosaccharide from Escherichia coli R1[1]](/Images/godic/202501/06/CoreOligo.svg3119.png")
Core oligosaccharide (or Core-OS) is a short chain of sugar residues within Gram-negative lipopolysaccharide (LPS). Core-OS are highly diverse among bacterial species and even within strains of species
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