Real-time PCR is a closed DNA amplification system that skillfully integrates biochemical, photoelectric and computer techniques. Fluorescence data acquired once per cycle provides rapid absolute quantification of ini...Real-time PCR is a closed DNA amplification system that skillfully integrates biochemical, photoelectric and computer techniques. Fluorescence data acquired once per cycle provides rapid absolute quantification of initial template copy numbers as PCR products are generated. This technique significantly simplifies and accelerates the process of producing reproducible quantification of nucleic acid molecules. It not only is a sensitive, accurate and rapid quantitative method, but it also provides an easier way to calculate the absolute starting copy number of nucleic acid molecules to be tested. Together with molecular bio-techniques, like microarray, real-time PCR will play a very important role in many aspects of molecular life science such as functional gene analysis and disease molecular diagnostics. This review introduces the detailed principles and application of the real-time PCR technique, describes a recently developed system for exact quantification of AUX/IAA genes In Arabidopsis, and discusses the problems with the real-time PCR process.展开更多
目的基于ITS序列用PCR-RFLP方法鉴别北柴胡药材掺伪藏柴胡的方法。方法分析并筛选出藏柴胡特有的限制性内切酶AseⅠ,用Primer Premier 5.0设计特异性引物,对引物PCR扩增条件和酶切试验进行优化,并对该方法的准确性进行了考察。结果PCR...目的基于ITS序列用PCR-RFLP方法鉴别北柴胡药材掺伪藏柴胡的方法。方法分析并筛选出藏柴胡特有的限制性内切酶AseⅠ,用Primer Premier 5.0设计特异性引物,对引物PCR扩增条件和酶切试验进行优化,并对该方法的准确性进行了考察。结果PCR扩增的目的片段为331 bp,且建立的PCR反应方法对不同的酶均具有适应性。限制性内切酶AseⅠ将藏柴胡切成79 bp和252 bp两个片段,而北柴胡及其他柴胡均不能被酶切,且掺伪检出限为1%。结论PCR-RFLP方法实现了准确鉴别北柴胡中的混伪品藏柴胡。展开更多
Using the BrdU antibody technique followed by an immuno-chemical staining(BAT),the amplification o f DNA fragments specific to human Y chromosome on cell specimen slides was efficiently detected. Whether direct BrdU i...Using the BrdU antibody technique followed by an immuno-chemical staining(BAT),the amplification o f DNA fragments specific to human Y chromosome on cell specimen slides was efficiently detected. Whether direct BrdU incorporation into PCR products or in situ hybridization with PCR products on slides, the amplified targetDNA fragments of specimen were visualized by BAT under the microscope. The availability of BAT and differencesin the sensitivity and efficiency between BAT and dig--if-dUTP labeling in cell in situ PCR were disCussed.展开更多
文摘Real-time PCR is a closed DNA amplification system that skillfully integrates biochemical, photoelectric and computer techniques. Fluorescence data acquired once per cycle provides rapid absolute quantification of initial template copy numbers as PCR products are generated. This technique significantly simplifies and accelerates the process of producing reproducible quantification of nucleic acid molecules. It not only is a sensitive, accurate and rapid quantitative method, but it also provides an easier way to calculate the absolute starting copy number of nucleic acid molecules to be tested. Together with molecular bio-techniques, like microarray, real-time PCR will play a very important role in many aspects of molecular life science such as functional gene analysis and disease molecular diagnostics. This review introduces the detailed principles and application of the real-time PCR technique, describes a recently developed system for exact quantification of AUX/IAA genes In Arabidopsis, and discusses the problems with the real-time PCR process.
文摘Using the BrdU antibody technique followed by an immuno-chemical staining(BAT),the amplification o f DNA fragments specific to human Y chromosome on cell specimen slides was efficiently detected. Whether direct BrdU incorporation into PCR products or in situ hybridization with PCR products on slides, the amplified targetDNA fragments of specimen were visualized by BAT under the microscope. The availability of BAT and differencesin the sensitivity and efficiency between BAT and dig--if-dUTP labeling in cell in situ PCR were disCussed.
