Now, two or more polysaccharide chains. So one and two. So let's say these two polysaccharide chains are connected by cross links between these amino acids, shown in purple. And these amino acids are connected by into bridges. So we see that the cell walls of our entire structure within our cell envelope consist of this type of molecule known as or this type of structure known as Peptidoglycan. And Peptidoglycan, generally speaking, contains relatively large pores.