Use of 16S-23S intergenic transcribed spacer (ITS) variability,as a relatively new method,is becoming an important supplement to the molecular methods based on 16S rRNA for which has a fairly constant size and is not ...Use of 16S-23S intergenic transcribed spacer (ITS) variability,as a relatively new method,is becoming an important supplement to the molecular methods based on 16S rRNA for which has a fairly constant size and is not divergent enough to give good separation in close relationships. This paper summarizes the structures and characteristics of ITS regions that are extremely variable in copy number,length and sequence per genome. The ITS region can be amplified easily taking advantage of conserved nucleotide stretches at the 5’ of the 16S and 3’ of the 23S gene,and the amplicon can contain different amounts of the 16S rDNA by choosing primers at different conserved areas within this gene. These primers are listed and discussed for perfecting the methodology of ITS. Furthermore,some recent progresses on the taxonomy,identification and community analysis of bacteria by means of ITS in epidemiology,ecology and artificial environment are reviewed,as well,the virtues and limitations of that method are discussed. Fig 2,Tab 1,Ref展开更多
16 S r RNA序列分析作为微生物系统分类的主要依据已得到广泛认同 ,随着微生物核糖体RNA数据库的日臻完善 ,该技术成为细菌分类和鉴定的一个有力工具。本文总结了 16 S r RNA作为海洋微生物系统分子分类鉴定的理论基础和具体方法 ,分析...16 S r RNA序列分析作为微生物系统分类的主要依据已得到广泛认同 ,随着微生物核糖体RNA数据库的日臻完善 ,该技术成为细菌分类和鉴定的一个有力工具。本文总结了 16 S r RNA作为海洋微生物系统分子分类鉴定的理论基础和具体方法 ,分析了用 16 S r RNA研究海洋微生物的进化关系 ,并且对 16 S r展开更多
文摘Use of 16S-23S intergenic transcribed spacer (ITS) variability,as a relatively new method,is becoming an important supplement to the molecular methods based on 16S rRNA for which has a fairly constant size and is not divergent enough to give good separation in close relationships. This paper summarizes the structures and characteristics of ITS regions that are extremely variable in copy number,length and sequence per genome. The ITS region can be amplified easily taking advantage of conserved nucleotide stretches at the 5’ of the 16S and 3’ of the 23S gene,and the amplicon can contain different amounts of the 16S rDNA by choosing primers at different conserved areas within this gene. These primers are listed and discussed for perfecting the methodology of ITS. Furthermore,some recent progresses on the taxonomy,identification and community analysis of bacteria by means of ITS in epidemiology,ecology and artificial environment are reviewed,as well,the virtues and limitations of that method are discussed. Fig 2,Tab 1,Ref
文摘16 S r RNA序列分析作为微生物系统分类的主要依据已得到广泛认同 ,随着微生物核糖体RNA数据库的日臻完善 ,该技术成为细菌分类和鉴定的一个有力工具。本文总结了 16 S r RNA作为海洋微生物系统分子分类鉴定的理论基础和具体方法 ,分析了用 16 S r RNA研究海洋微生物的进化关系 ,并且对 16 S r
