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Results 651 - 690 of 690
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Doyle J J - - 1990
The Glycine tabacina polyploid complex has been shown to include a minimum of two morphological and crossing groups, which also differ in chloroplast DNA (cpDNA) restriction map and nuclear ribosomal gene repeat phenotype. These AAB2B2 and BBB2B2 G. tabacina polyploids contain plastomes referable to the A and B diploid plastome ...
Watts T L - - 1989
Probing error may arise from several sources, including visual observations and tactile detection of the cementoenamel junction (CEJ). This study examined two types of probe scale in relation to measurements of recession and CEJ from a flexible stent, and two types of probe design in addition, in relation to CEJ ...
Simon M - - 1989
The human involucrin gene has been mapped to the region q21-q22 of chromosome 1. Three of six Utah families examined were polymorphic for a PstI fragment of the involucrin gene. In one individual, the variant PstI fragment was found by DNA sequencing to be missing one of the 39 repeats ...
Altherr M R - - 1989
A novel mildly repetitive DNA sequence that is reiterated approximately 20 times in the human genome has been isolated and characterized. Most of the repeat units are localized very near the terminus of the short arm of chromosome 4 (4p) in the region known to contain the Huntington disease (HD) ...
de Steensma H Y - - 1989
A 17 kb region from near the right end of chromosome I of Saccharomyces cerevisiae was isolated on recombinant lambda bacteriophages. This region contained the PHO11 gene which was located only 3.4 kb from the right end of the chromosome. We found that this region also was repeated approximately 13 ...
Müller U - - 1989
Y-chromosomal rearrangements, a common cause of sex reversal in man, frequently occur between two blocks of repeated DNA. Both blocks are composed of 20-kb tandemly repeated Y-chromosome-specific DNA sequences. They are located in the proximal portion of the Y short arm on a NotI restriction fragment of approximately 5.3 Mb ...
Lowenhaupt K - - 1989
Long stretches of (dC-dA)n.(dT-dG)n, abbreviated CA/TG, have a distinctive distribution on Drosophila chromosomes (M.L. Pardue, K. Lowenhaupt, A. Rich, and A. Nordheim, EMBO J. 6:1781-1789, 1987). The distribution of CA/TG suggests a correlation with the overall transcriptional activity of chromosomal regions and with the ability to undergo meiotic recombination. These ...
Erickson R P - - 1988
In order to determine whether the regional localizations of Bkm repeats detected on the human X chromosome consisted of typical GATA/GACA repeats, clones were isolated, mapped, and sequenced. Nine Bkm-hybridizing clones from Kunkel's fluorescent-activated, cell-sorted X-chromosome library were all unique. Five were mapped in detail with restriction enzymes and the ...
Katzenberg D R - - 1988
The technique of genomic Southern blot analysis was employed to map the sites of class switch rearrangement in five hybridoma cell lines, four of which produce gamma 2b, whereas the fifth secretes gamma 2a. Two of the class switch recombinations we have mapped represent secondary switches to gamma 2b with ...
Murchie A I - - 1987
There are two alternative pathways by which inverted repeat sequences in supercoiled DNA molecules may extrude cruciform structures, called C-type and S-type. S-type cruciforms, which form the great majority, are characterised by absolute requirement for cations to promote extrusion, which then proceeds at higher temperatures and with lower activation parameters ...
Blum W F - - 1987
Human somatomedins (Sm) are heterogeneous on separation by chromatofocussing. Besides the 'classic' insulin-like growth factor I and II (IGF-I/Sm-C and IGF-II), a number of minor peaks emerge which can be classified as IGF-I/Sm-C-like or as IGF-II-like. The aim of the current study was to investigate whether or not polymorphism of ...
Wong Z - - 1987
Five of the most variable loci detected in human DNA by hybridization with DNA fingerprint probes have been cloned and characterized. Each locus consists of a tandem-repetitive minisatellite, with repeat units ranging in length from 9 to 45 base pairs depending on the locus. All of these cloned minisatellites act ...
Mock B A - - 1987
Mo-10, a homeo box-containing sequence in the Hox-1 complex of genes referred to as Hox-1.5, was found to be polymorphic in inbred and wild mice, and a strain distribution of three allelic forms of Hox-1.5 are reported. The position of Hox-1.5 was mapped in backcross experiments to within 1 cM ...
Weber B - - 1987
In situ hybridization using a repeated element specific for the human pseudoautosomal region, DXYZ2, revealed the presence of this repeat in the early replicating portion of the sex chromosomes of the great apes. This segment, as well as the DXYZ2 repeats, are located in band Xp22.3 and in a telomeric ...
Smith K D - - 1987
A significant fraction of the human Y chromosome is composed of DNA sequences which have homologues on the X chromosome or autosomes in humans and non-human primates. However, most human Y-chromosome sequences so far examined do not have homologues on the Y chromosomes of other primates. This observation suggests that ...
Palmer J D - - 1986
We constructed complete physical maps of the tripartite mitochondrial genomes of two Crucifers, Brassica nigra (black mustard) and Raphanus sativa (radish). Both genomes contain two copies of a direct repeat engaged in intragenomic recombination. The outcome of this recombination in black mustard is to interconvert a 231 kb master chromosome ...
Müller U - - 1986
Two DNA probes from within a single large insert from a recombinant phage-DNA library that was constructed from flow-sorted chromosomes enriched for the human X chromosome were shown to hybridize with repeated X-specific and autosomal DNA sequences. The X-chromosomal repeated sequences were assigned to the distal long arm of the ...
Nallaseth F S - - 1986
Male specific repeated sequences compose approximately 10% of the mouse Y chromosome. This was deduced from studies of genomic phage clones that contain male specific DNA, and three subcloned EcoRI fragments pBC10-0.6, pBC15-1.1, and pBA33-1.8. Southern analyses and in situ hybridization of metaphase chromosomes show these three sequences to be ...
Berget A - - 1985
In inflammatory cytology without suspicion of cervical neoplasia (Papanicolaou II) a pelvic examination is done in order to exclude a macroscopic visible tumor. After treatment of an inflammation a repeat cytology and a colposcopy is performed preferably 8 to 12 weeks later. If the cytology or the colposcopy is abnormal, ...
Hammersley N - - 1985
Six patients with oral leukoplakia were treated by the daily application of a 0.5 per cent (w/v) solution of bleomycin sulphate in dimethyl sulphoxide. After 12 to 15 applications, the white patch peeled off and the resultant raw surface epithelialised over the following 14 days. Repeat biopsies showed a significant ...
Wolfe J - - 1985
A collection of human Y-derived cosmid clones was screened with a plasmid insert containing a member of the human X chromosome alphoid repeat family, DXZ1. Two positive cosmids were isolated and the repeats they contained were investigated by Southern blotting, in situ hybridization and sequence analysis. On hybridization to human ...
Burk R D - - 1985
The human Y chromosome contains a group of repeated DNA elements, identified as 3.4-kilobase pair (kb) fragments in Hae III digests of male genomic DNA, which contain both Y-specific and non-Y-specific sequences. We have used these 3.4-kb Hae III Y fragments to explore the organizational properties and chromosomal distribution of ...
Garfin S R - - 1985
It has been recommended that halo torque screwdrivers be used only once. To determine if this advice is justified on biomechanical grounds, five commercially available torque screwdrivers were cycled 1,600 times each in an Instron testing machine over a 7-day period. The screwdrivers displayed an initial error from the dial ...
Jeanpierre M - - 1985
Several clones containing clusters of repetitive elements were isolated from a human chromosome 22 specific library. An EcoRI-XhoI fragment of 860bp was subcloned and was shown to belong to a family of tandemly repeated DNA linked to the Y-specific 3.4 kb HaeIII band. This probe hybridizes to several sets of ...
Jabs E W - - 1984
We have identified a human DNA recombinant (p308) with a 3.0-kilobase (kb) BamHI insert that hybridizes in situ exclusively to the centromeric region of all human autosomes and the X chromosome. This highly repetitive sequence is significantly enriched on several chromosomes, most prominently on chromosome 6. In all individuals, the ...
Singh L - - 1984
We have recovered a conserved transcribed component of the snake W chromosome satellite DNA (Bkm) from Drosophila and male mouse libraries. This consists of repeats of the tetranucleotide GATA that are concentrated in the sex-determining region of the Y chromosome of mouse, on the W chromosome of snakes, and in ...
Miklos G L - - 1984
A recombinant Charon 4 bacteriophage has been isolated on the basis of RNAs which are enriched in the head of the adult Drosophila melanogaster and hence are likely to be of neural origin. The cloned insert maps to the near vicinity of the uncoordinated locus in polytene chromosome band 19E8. ...
Willard H F - - 1983
We report the identification and characterization of a family of repeated restriction fragments whose molecular organization is apparently specific to the human X chromosome. This fragment, identified as an ethidium bromide-staining 2.0 kilobase (kb) band in BamHI-digested DNA from a Chinese hamster-human somatic cell hybrid containing a human X chromosome, ...
Yaar I - - 1983
A quantitative EEG study was done in order to confirm previous impressions that there is a significant EEG response to levodopa in parkinsonian patients, and in order to trace the existence of dopaminergic mechanisms in the generation of the human EEG. EEGs of twenty-five parkinsonian patients were recorded both before ...
Schneider A M - - 1983
Bacillus subtilis strains possessing the trpE30 marker (splitting of the trpE locus and a non-tandem duplication of chromosome segment Ib: purB-tre) when transformed or transduced to tryptophan independence mainly give rise to haploid cells with the genetic structure of strain 168. However, among the Trp+ transformants or transductants about 10% ...
Burk R D - - 1983
We have used two repeated DNA fragments (3.4 and 2.1 kb) released from Y chromosome DNA by digestion with the restriction endonuclease Hae III to analyze potential Y chromosome/autosome translocations. Two female patients were studied who each had an abnormal chromosome 22 with extra quinacrine fluorescent material on the short ...
Sharp Z D - - 1983
The nucleolus organizer (NO) of the D. melanogaster X chromosome is composed of ribosomal repeat units which contain two types (I and II) of non-rDNA insertions (In+) and repeats with no insertions (In-). Evidence from other laboratories indicate random interspersion of all types of repeat units within the X NO. ...
Videman T - - 1982
The objective of this study was to compare the degree of osteoarthritis caused by different periods of repeated immobilization and mobilization. Existing knowledge of the pathogenic factors causing osteoarthritis is deficient, but it is well known that long-term immobilization produces degenerative joint changes. In this experimental study it is shown ...
Hartley S E - - 1982
Chromosome preparations from lymphocyte cultures of 50 rainbow trout were studied. Diploid chromosome numbers of 59, 60, 61, 62 and 63 were found in different individuals in which the arm number (NF) was 104. Intraindividual polymorphism was found at a low level in 25 of the fish. The results suggest ...
Sato H - - 1981
Following segregation of the alleles at the Sas-1, LyM-1 and M1s in the (AKA/J X C3H/HeJ/F1 X C3H/HeJ backcross progeny, we found the locus responsible for the lymphocyte alloantigen LyM-1 to be closely linked to Sas-1 and M1s. The map distances are estimated to be 12.5 +/- 3.9 for Sas-1 ...
Chevalier P A - - 1978
A computer-based biplane videoroentgenographic recording technique that determines the spatial coordinates of radiopaque lung parenchymal markers was used to compare regional lung expansion at total lung capacity (TLC) in the intact dog (prone and supine) and after removal from the chest. The reproducibility of the technique was examined by repeated ...
Csonka E - - 1978
In two out of a total of 6 cases of subacute sclerosing panencephalitis with manifest chromosome alterations, chromosome studies were repeated 4 and 5 years of standing, respectively, after manifestation of the disease. In one case the incidence of chromosome alterations increased while in the other no change was found. ...
Judd W J - - 1977
A 'new' Lutheran-related antibody, named anti-Lu14, reacts with approximately 2.4% of random bloods. Red cells of the rare Lu:-8 phenotype are Lu:14. The data indicate, with a high probability, that the Lu 14 antigen is a product of an allele of Lu8 and that Lu14 and Lu8 comprise a third ...
McKenzie J A - - 1975
The retina of 390 Alosa aestivalis and 410 Alosa pseudoharengus have been examined by means of starch-gel electrophoresis. The retina-specific E4 isozyme has been found to occur in all the fish examined. This study demonstrates for the first time that the E4 isozyme occurs in A. aestivalis. Because the E4 ...
Gedeon A K - - 1992
Genomic insert DNAs from 45 probes representing 113.4 kb of the X chromosome were screened for AC dinucleotide repeat sequence. Two new AC repeat sequences were identified with length polymorphism based on variation in repeat copy number. One at DXS237 exhibits 44% heterozygosity and is potentially useful for rapid diagnosis ...
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