观察方法: 质壁分离后结合鉴别性染色在光学显微镜下观察 原生质体破裂 超薄切片电镜观察 在上下两暗色层之间夹着一 浅色中间层的双层膜结构 Ught area Dark area s glycerol portion of region of fatty aods Cytoplasmic membrane x phospholipid (hydrophilic) (hyd FIGURE 3.32 High magnfication thin section of the cell envelope of Eschenchia coll showing the periplasmic gel bounded by the outer mem brane and the cytoplasmic membrane. The large dark particles in the cytoplasm are ribosomes. The thickness of the cytoplasmic membrane is 7.5 nm观察方法： 质壁分离后结合鉴别性染色在光学显微镜下观察； 原生质体破裂； 超薄切片电镜观察； 在上下两暗色层之间夹着一 浅色中间层的双层膜结构