And some of these sugar components basically are attached to short peptides. So we have this 1234 amino acid tetrapeptide and we also have these 12345 so pentapeptides. And we see that these tetrapeptides are connected to the tetrapeptides of the adjacent linear polysaccharide chain by these pentapeptides. And these linkages are known as cross linkages and they're the green linkages shown in this diagram. So the peptaglyc and cell wall consists of long sugar chains that are connected by cross linkages between the short peptides. So this blue peptide here is connected to this blue peptide of the Jason polysaccharide chain via this five peptide.