液人手 Gram stain Divides bacteria into 2 groups Gram-positive Gram-negative ◆ Thick peptidoglycan ◆ Thin peptidoglycan 90% peptidoglycan ◆5-10% peptidoglycan Teichoic acids ◆ No teichoic acids Not many ◆ Outer membrane has polysaccharides lipids, polysaccharides MEDICAL MICROBIOLOGY EXPERIMENT 1 Wang YuyanMEDICAL MICROBIOLOGY EXPERIMENT 1 Wang Yuyan ® ® ® ® ® ® ® ® Thick peptidoglycan 90% peptidoglycan Teichoic acids Not many polysaccharides Gram stain Divides bacteria into 2 groups Gram-positive Gram-negative Thin peptidoglycan 5-10% peptidoglycan No teichoic acids Outer membrane has lipids, polysaccharides