Fig. 5From: Bioinformatic analysis of structures and encoding genes of Escherichia coli surface polysaccharides sheds light on the heterologous biosynthesis of glycansComposition of sugars under different classifications in O antigen and K antigen. (A) Composition in O antigen. (B) Composition in K antigen. According to the number of carbons, sugars can be named pentose, hexose, heptose, octose, and nonose, among others. Furthermore, a sugar is divided into α/β or D-/L- according to their configuration and pyran or furan according to the heterocyclic structureBack to article page