The hydroboration of olefins with Et(2)BH provides diethyl(alkyl)boranes 2 which readily undergo a boron-zincexchange with Et(2)Zn providing a range of polyfunctional primary, secondary, and benzylic diorganozincs. The resulting diorganozincs 3 have been reacted with various electrophiles (allylic halides, acid chlorides, alkylidenemalonates, ethyl propiolate, nitroolefins) in the presence of CuCN
申请人:The Institute of Physical and Chemical Research
公开号:US06265569B1
公开(公告)日:2001-07-24
Disclosed are 3′-deoxyribonucleotide derivatives represented by the following general formula [I]:
Q—V—(CH2)n—NH—R [I]
wherein Q represents a 3′-deoxyribonucleotide residue, n represents an integer not less than 4, V represents —C≡C— or —CH═CH—, and R represents a fluorescent group.
The above 3′-deoxyribonucleotide derivatives are derivatives with improved rates for incorporation using RNA polymerases, which are useful as terminators in the DNA sequence determination methods utilizing RNA polymerases.
申请人:The Institute of Physical and Chemical Research
公开号:US06365350B1
公开(公告)日:2002-04-02
Disclosed are methods for determining DNA nucleotide sequences comprising reacting ribonucleoside 5′-triphosphates and 3′-dNTP derivatives in the presence of an RNA polymerase modified so as to enhance its ability for incorporating the 3′-dNTP derivatives and a DNA fragment containing a promoter sequence for the RNA polymerase to obtain a nucleic acid transcription product, separating the resulting nucleic acid transcription product, and determining a nucleic acid sequence from the resulting separated fraction. These methods can produce a transcription product of a long chain and afford more accurate sequence data where fluctuation of signals from labeled deoxyribonucleotides is reduced.
A method of DNA sequencing comprising reacting a ribonucleoside 5'-triphosphate with a 3'dNTP derivative in the presence of a mutated RNA polymerase modified so as to enhance the ability to take up the 3'dNTP derivative and a DNA fragment containing a promoter sequence for the RNA polymerase, separating the nucleic acid transcription product thus obtained, and reading the sequence of the nucleic acid from the fraction thus separated. By using this method, a long-chain transcription product can be formed and more accurate sequence data with little change in the signals from labeled deoxyribonucleotides can be obtained.
一种 DNA 测序方法,包括在经过修饰以提高吸收 3'dNTP 衍生物能力的突变 RNA 聚合酶和含有 RNA 聚合酶启动子序列的 DNA 片段存在的情况下,使核糖核苷 5'- 三磷酸酯与 3'dNTP 衍生物反应,分离由此获得的核酸转录产物,并从由此分离的部分读取核酸序列。使用这种方法可以形成长链转录产物,获得更准确的序列数据,而标记脱氧核苷酸的信号变化很小。
3'-DEOXYRIBONUCLEOTIDE DERIVATIVES
申请人:THE INSTITUTE OF PHYSICAL & CHEMICAL RESEARCH
公开号:EP1046648A1
公开(公告)日:2000-10-25
3'-Deoxyribonucleotide derivatives represented by the following general formula [I]: Q-V-(CH2)n-NR-R wherein Q represents a 3'-deoxyribonucleotide residue; n is an integer of 4 or more; V represents -C≡C- or -CH=CH-; and R represents a fluorescent group. Because of having been improved in the uptake efficiency by RNA polymerases, these derivatives are useful as terminators in DNA base sequencing methods with the use of RNA polymerases.