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Restriction map

About: Restriction map is a research topic. Over the lifetime, 5810 publications have been published within this topic receiving 305663 citations.


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Journal ArticleDOI
TL;DR: This paper describes a method of transferring fragments of DNA from agarose gels to cellulose nitrate filters that can be hybridized to radioactive RNA and hybrids detected by radioautography or fluorography.

30,291 citations

Journal ArticleDOI
TL;DR: A mathematical model for the evolutionary change of restriction sites in mitochondrial DNA is developed and a measure called "nucleotide diversity" is proposed to express the degree of polymorphism in a population at the nucleotide level.
Abstract: A mathematical model for the evolutionary change of restriction sites in mitochondrial DNA is developed. Formulas based on this model are presented for estimating the number of nucleotide substitutions between two populations or species. To express the degree of polymorphism in a population at the nucleotide level, a measure called "nucleotide diversity" is proposed.

10,089 citations

Journal ArticleDOI
TL;DR: A novel approach that uses the polymerase chain reaction (PCR) for rapid simplified restriction typing and mapping of DNA from many different isolates is described, which ought to have wide applicability for clinical detection and other studies.
Abstract: Detailed restriction analyses of many samples often require substantial amounts of time and effort for DNA extraction, restriction digests, Southern blotting, and hybridization. We describe a novel approach that uses the polymerase chain reaction (PCR) for rapid simplified restriction typing and mapping of DNA from many different isolates. DNA fragments up to 2 kilobase pairs in length were efficiently amplified from crude DNA samples of several pathogenic Cryptococcus species, including C. neoformans, C. albidus, C. laurentii, and C. uniguttulatus. Digestion and electrophoresis of the PCR products by using frequent-cutting restriction enzymes produced complex restriction phenotypes (fingerprints) that were often unique for each strain or species. We used the PCR to amplify and analyze restriction pattern variation within three major portions of the ribosomal DNA (rDNA) repeats from these fungi. Detailed mapping of many restriction sites within the rDNA locus was determined by fingerprint analysis of progressively larger PCR fragments sharing a common primer site at one end. As judged by PCR fingerprints, the rDNA of 19 C. neoformans isolates showed no variation for four restriction enzymes that we surveyed. Other Cryptococcus spp. showed varying levels of restriction pattern variation within their rDNAs and were shown to be genetically distinct from C. neoformans. The PCR primers used in this study have also been successfully applied for amplification of rDNAs from other pathogenic and nonpathogenic fungi, including Candida spp., and ought to have wide applicability for clinical detection and other studies.

4,187 citations

Journal ArticleDOI
30 Dec 1988-Gene
TL;DR: The production of new alleles of the LEU2, URA3 and TRP1 genes of Saccharomyces cerevisiae by in vitro mutagenesis is described and a unique series of yeast-Escherichia coli shuttle vectors derived from the plasmid pUC19 are constructed.

2,860 citations

Journal ArticleDOI
TL;DR: A multipurpose cloning site has been introduced into the gene for beta-galactosidase on the single-stranded DNA phage M13mp2 with the use of synthetic DNA and two restriction endonuclease cleavage sites in the viral gene II were removed by single base-pair mutations.
Abstract: A multipurpose cloning site has been introduced into the gene for beta-galactosidase (beta-D-galactosidegalactohydrolase, EC 3.21.23) on the single-stranded DNA phage M13mp2 (Gronenborn, B. and Messing, J., (1978) Nature 272, 375-377) with the use of synthetic DNA. The site contributes 14 additional codons and does not affect the ability of the lac gene product to undergo intracistronic complementation. Two restriction endonuclease cleavage sites in the viral gene II were removed by single base-pair mutations. Using the new phage M13mp7, DNA fragments generated by cleavage with a variety of different restriction endonucleases can be cloned directly. The nucleotide sequences of the cloned DNAs can be determined rapidly by DNA synthesis using chain terminators and a synthetic oligonucleotide primer complementary to 15 bases preceeding the new array of restriction sites.

2,360 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20222
20213
20201
20193
20186
20174