Figure 2.

A pictorial explanation of Wzy-mediated CPS synthesis. Repeated patterns of monosaccharides are transported to and added to undecaprenylphosphate (Und-p). The polysaccharide strip is then flipped across the membrane by Wzx flippase and repeat segments are added onto the non-reducing end by Wzy polymerase. Once the desired length is reached, polysaccharide chains are exported from the cell membrane to the peptidoglycan by unknown means, where they bind covalently via glycosidic bond.