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... We have previously reported an enhanced version of sequencing by hybridization (SBH), termed positional SBH (PSBH). PSBH uses partially duplex probes containing single-stranded 3' overhangs, instead of simple single-stranded probes. Stacking interactions between the duplex probe and a single-stranded target allow us to reduce the probe sizes required to 5-base single-stranded overhangs. Here we de ...
sequence analysis; DNA primers; DNA; electron transfer; fluorescein
Abstract:
... Fluorescent dye-labeled DNA primers have been developed that exploit fluorescence energy transfer (ET) to optimize the absorption and emission properties of the label. These primers carry a fluorescein derivative at the 5' end as a common donor and other fluorescein and rhodamine derivatives attached to a modified thymidine residue within the primer sequence as acceptors. Adjustment of the donor-a ...
... The tobacco N and Arabidopsis RPS2 genes, among several recently cloned disease-resistance genes, share a highly conserved structure, a nucleotide-binding site (NBS). Using degenerate oligonucleotide primers for the NBS region of N and RPS2, we have amplified and cloned the NBS sequences from soybean. Each of these PCR-derived NBS clones detected low- or moderate-copy soybean DNA sequences and bel ...
Triticum turgidum; Southern blotting; Elytrigia; cultivars; hybrids; restriction fragment length polymorphism; intergeneric hybridization; random amplified polymorphic DNA technique; backcrossing; Thinopyrum pycnanthum; DNA primers; Leymus; DNA; genomics; Elymus; Thinopyrum elongatum; Thinopyrum bessarabicum; genetic markers
Abstract:
... The objective of this study was to detect the presence of alien chromatin in intergeneric hybrids of durum wheat (Triticum turgidum, 2n = 4x = 28; AABB genomes) with the perennial grass Thinopyrum junceiforme (2n = 4x = 28; J1J1J2J2) using RAPD markers. The first step was to identify amplification of species-specific DNA markers in the parental grass species and durum wheat cultivars. Initially, t ...
Oryza sativa; DNA libraries; clones; screening; polymerase chain reaction; DNA; loci; nucleotide sequences; DNA fingerprinting; genome; DNA primers
Abstract:
... In this article, we used PCR analysis with arbitrary primers (AP-PCR) to screen for overlapping bacterial artificial chromosome (BAC) clones and assembly of contigs. A rice BAC library with three genome equivalents was used to prepare pooled BAC DNA. Twenty-two arbitrary primers were used to survey the pooled BAC DNAs and individual BAC DNAs. Each primer identified 1-10 loci, and the average was 4 ...
... Simple-sequence repeats (SSRs) may prove to be valuable descriptors of plant genetic variation, but developing markers for each of many taxa is costly. The applicability of SSR markers may be increased if they can be amplified across taxa. In this study, we examined whether 30 primer pairs designed to amplify single-locus SSRs in Arabidopsis thaliana could be used to amplify marker loci in six Bra ...
... Salmonella infections continue to cause gastrointestinal and systemic disease throughout the world. Salmonella typhimurium DT104 further poses a major health concern due to its acquisition of resistance to multiple antibiotics. The rapid detection of multiresistant S. typhimurium DT104 would facilitate strategies aimed at controlling this pathogen. We developed a specific and sensitive polymerase ...
... Multilocus-genotyping methods have shown that Escherichia coli O157:H7 is a geographically disseminated clone. However, high-resolution methods such as pulse-field gel electrophoresis demonstrate significant genomic diversity among different isolates. To assess the genetic relationship of human and bovine isolates of E. coli O157:H7 in detail, we have developed an octamer-based genome-scanning met ...
... Total DNA was isolated from swine feces and a swine waste storage pit and used as templates for PCR amplification of archaeal 16S rDNA using specific primers. Only the sample from the center of the waste pit produced a PCR product. DNA sequence analyses of random clones demonstrated a variety of methanogenic archaea. Six groups of sequences were identified, including those similar to Methanobrevib ...
... Semi-automated detection of Enterohaemorrhagic Escherichia coli (EHEC) O157:H7 and non-O157:H7 Shiga toxin-producing E. coli (STEC) was achieved using fluorogenic polymerase chain reaction (PCR). These PCR assays were designed to amplify 80, 120 and 150 bp regions of virulence genes stx1 , stx2 and eaeA , respectively, using specific primers. The fluorogenic probes were used for specific detection ...
polymerase chain reaction; nucleases; food microbiology; DNA primers
Abstract:
... Campylobacter jejuni is recognized as a leading human food-borne pathogen. Traditional diagnostic testing for C. jejuni is not reliable due to special growth requirements and the possibility that this bacterium can enter a viable but nonculturable state. Nucleic acid-based tests have emerged as a useful alternative to traditional enrichment testing. In this article, we present a 5'-nuclease PCR as ...
... An unidentified isolate of a Sarcocystis falcatula-like parasite was obtained from the lungs of budgerigars (Melopsittacus undulatus) fed sporocysts from a naturally-infected South American opossum, Didelphis albiventris from Brazil. Four captive budgerigars fed sporocysts from the opossum intestine died of acute sarcocystosis 8, 10, and 12 days after oral inoculation (DAI); one budgerigar was kil ...
tomatoes; patents; Cucumis sativus; DNA primers; cucumbers; polymerase chain reaction; amino acid sequences; gene expression; multigene family; ripening; nucleotide sequences; 1-aminocyclopropane-1-carboxylate synthase; USDA; enzyme activity; Solanum lycopersicum var. lycopersicum; United States
Abstract:
... ACC synthases of higher plants are coded by multigene families; only certain members of these families are responsible for various plant development characteristics effected by ethylene. Control of the processes in plants which are mediated by ACC synthase, such as fruit ripening, can be effected by controlling expression of the relevant ACC synthase gene. In addition, comparison of the amino acid ...
... Intracellular bacteria have been found previously in one isolate of the arbuscular mycorrhizal (AM) fungus Gigaspora margarita BEG 34. In this study, we extended our investigation to 11 fungal isolates obtained from different geographic areas and belonging to six different species of the family Gigasporaceae. With the exception of Gigaspora rosea, isolates of all of the AM species harbored bacteri ...
DNA fragmentation; DNA primers; Lactobacillus; denaturing gradient gel electrophoresis; genes; genetic databases; humans; intergenic DNA; mice; nucleotide sequences; polymerase chain reaction; ribosomal RNA; stomach; swine
Abstract:
... Denaturing gradient gel electrophoresis (DGGE) of DNA fragments obtained by PCR amplification of the V2-V3 region of the 16S rRNA gene was used to detect the presence of Lactobacillus species in the stomach contents of mice. Lactobacillus isolates cultured from human and porcine gastrointestinal samples were identified to the species level by using a combination of DGGE and species-specific PCR pr ...
... Multiplexing involves the analysis of several markers in a single gel lane that is based on the allele size range of marker loci. Multiplex SSR marker analysis is conducted with primers that are labeled with one of three dyes. The development of an SSR multiplex system requires estimates of the allele size range of markers to strategize primer labeling and for grouping markers into multiplex sets. ...