六、细菌细胞结构 ❖一般构造:如细胞壁、细胞膜、细胞质、核质体、核糖体等,是 所有细菌都有的构造 ❖特殊构造:主要有鞭毛、菌毛、性菌毛、荚膜和芽孢等,并非所 有细菌都有的构造
六、细菌细胞结构 ❖一般构造:如细胞壁、细胞膜、细胞质、核质体、核糖体等,是 所有细菌都有的构造 ❖特殊构造:主要有鞭毛、菌毛、性菌毛、荚膜和芽孢等,并非所 有细菌都有的构造
Figure 1. Schematic diagram of a typical procaryotic cell. Minimally, a procaryote is composed of a cell wall and plasma membrane that surrounds its cytoplasm containing a chromosome, ribosomes, enzymes, several classes of RNA, and small molecules (precursors)
Figure 1. Schematic diagram of a typical procaryotic cell. Minimally, a procaryote is composed of a cell wall and plasma membrane that surrounds its cytoplasm containing a chromosome, ribosomes, enzymes, several classes of RNA, and small molecules (precursors)
(一)细胞壁cell wall: 细胞壁的观察方法: ① 质壁分离+染色 ② 电镜观察 G+与Gˉ细菌cw 的模式结构 ★共有组分— 肽聚糖 ★特有组分—G+ 磷壁酸 Gˉ 脂多糖 细胞壁是位于菌体的外层,内 侧紧贴细胞膜的一层无色透明, 坚韧而有弹性的结构。细胞壁 约占细胞干重的10%—25%
(一)细胞壁cell wall: 细胞壁的观察方法: ① 质壁分离+染色 ② 电镜观察 G+与Gˉ细菌cw 的模式结构 ★共有组分— 肽聚糖 ★特有组分—G+ 磷壁酸 Gˉ 脂多糖 细胞壁是位于菌体的外层,内 侧紧贴细胞膜的一层无色透明, 坚韧而有弹性的结构。细胞壁 约占细胞干重的10%—25%
Figure 3 - Electron Figure 4 - Electron micrograph of a G+ cell wall. micrograph of a G - cell wall
Figure 3 - Electron Figure 4 - Electron micrograph of a G+ cell wall. micrograph of a G - cell wall
细胞壁cell wall:
细胞壁cell wall: