h 上游充通大￥ Shanghai Jiao Tong University 4.10 Bacterial cell surface structures Glycocalyx糖被：slimy or gummy materials on prokaryotic cell surfaces,consist of polysaccharide (sometimes protein). Shanghai Jiao Tong UniversityShanghai Jiao Tong University Shanghai Jiao Tong University 4.10 Bacterial cell surface structures Glycocalyx 糖被: slimy or gummy materials on prokaryotic cell surfaces, consist of polysaccharide (sometimes protein)