oligosaccharides and polysaccharidespeptidoglycan polysaccharideextracellular polysaccharidepolysaccharides includebacterial polysaccharidesstructural polysaccharideso specific polysaccharidechitin polysaccharideprotein polysaccharidemushroom polysaccharidesstarch is a polysaccharideastragalus polysaccharide