上岸充通大学 Shanghai Jiao Tong University 2.2 Arrangement of DNA in Microbial Cells:Bacterial Nucleoid Nucleoid aggregated DNA /bacterial chromosome in the prokaryotic cell类核：用于描述原核细胞中 聚集在一起的DNA Membrane. Wall DNA Chen Feng,Shanghai Jiao Tong University
Shanghai Jiao Tong University Chen Feng, Shanghai Jiao Tong University Nucleoid : aggregated DNA /bacterial chromosome in the prokaryotic cell 类核：用于描述原核细胞中 聚集在一起的DNA 2.2 Arrangement of DNA in Microbial Cells: Bacterial Nucleoid
(Arrows point to edge of strands). 0 By gently lysing the cells,the highly compacted nucleoid will emerge intact.采用极轻微小心的细胞 裂解方法，就可以得到一团完整展开的类核DNA
By gently lysing the cells, the highly compacted nucleoid will emerge intact. 采用极轻微小心的细胞 裂解方法，就可以得到一团完整展开的类核DNA。 (Arrows point to edge of strands)
上游充通大￥ Shanghai Jiao Tong University 国 Bacteria contain one long circular DNA- chromosome.细菌的类核包含一条环状的DNA (染色体) The DNA can be 1mm long ©The cell is usually2-3μm long Membrane Wall DNA Chen Feng,Shanghai Jiao Tong University
Shanghai Jiao Tong University Chen Feng, Shanghai Jiao Tong University Bacteria contain one long circular DNAchromosome. 细菌的类核包含一条环状的DNA (染色体) The DNA can be 1mm long The cell is usually 2-3m long
Open circle Supercoiled The DNA in both the open circle and supercoiled chromosome is present in a covalently closed form.超螺旋
The DNA in both the open circle and supercoiled chromosome is present in a covalently closed form. 超螺旋
Proteins Supercoiled domain AAUAA The double-stranded DNA in E.coli chromosome contains over 50 supercoiled domains.超螺旋域
The double-stranded DNA in E. coli chromosome contains over 50 supercoiled domains.超螺旋域