1,720,962 research outputs found
A NEW HLA-DPB1 ALLELE FROM A PATIENT WITH SYSTEMIC LUPUS-ERYTHEMATOSUS
No full textKORIOTH F, HARTUNG K, DEICHER H, Frey J. A NEW HLA-DPB1 ALLELE FROM A PATIENT WITH SYSTEMIC LUPUS-ERYTHEMATOSUS. TISSUE ANTIGENS. 1992;39(4):216-219
MOLECULAR CHARACTERIZATION OF NDP52, A NOVEL PROTEIN OF THE NUCLEAR DOMAIN-10, WHICH IS REDISTRIBUTED UPON VIRUS-INFECTION AND INTERFERON TREATMENT
Get PDFKORIOTH F, GIEFFERS C, MAUL GG, FREY J. MOLECULAR CHARACTERIZATION OF NDP52, A NOVEL PROTEIN OF THE NUCLEAR DOMAIN-10, WHICH IS REDISTRIBUTED UPON VIRUS-INFECTION AND INTERFERON TREATMENT. JOURNAL OF CELL BIOLOGY. 1995;130(1):1-13
CLONING AND CHARACTERIZATION OF THE HUMAN GENE ENCODING ASPARTYL BETA-HYDROXYLASE
No full textKORIOTH F, GIEFFERS C, Frey J. CLONING AND CHARACTERIZATION OF THE HUMAN GENE ENCODING ASPARTYL BETA-HYDROXYLASE. GENE. 1994;150(2):395-399.Sequence information for aspartyl beta-hydroxylase (AspH), which specifically hydroxylates one Asp or Asn residue in certain epidermal growth factor (EGF)-like domains oi a number of proteins, is so far only described for bovine species. We have isolated a 4.3-kb cDNA encoding the human AspH (hAspH) by immunoscreening of a human osteosarcoma (MG63) cDNA library in lambda ZAP with an antiserum raised against membrane fractions of these cells. Northern blot analyses revealed two transcripts with lengths of 2.6 and 4.3 kb. The deduced amino acid (aa) sequence of this cDNA encodes a protein of 757 aa (85 kDa). Comparison with the deduced bovine AspH (bAspH) aa sequence showed striking differences in the N-terminal portion of this protein. In vitro transcription and translation in the presence of canine pancreas microsomes yielded a 56-kDa protein. Western blot analyses of membrane fractions from MG63 cells with AspH-specific antibodies revealed a protein of the same M(r). These results suggest a posttranslational cleavage of the catalytic C terminus in the lumen of the endoplasmic reticulum
Mitofilin is a transmembrane protein of the inner mitochondrial membrane expressed as two isoforms
No full textGieffers C, Korioth F, Heimann P, Ungermann C, Frey J. Mitofilin is a transmembrane protein of the inner mitochondrial membrane expressed as two isoforms. EXPERIMENTAL CELL RESEARCH. 1997;232(2):395-399.Mitofilin, also known as heart muscle protein, is a recently identified mitochondrial protein. We have isolated two human cDNAs that encode different isoforms of mitofilin. Using reverse PCR, we provide evidence that both isoforms are derived by alternative splicing and encode two proteins of 88 and 90 kDa that are detected in immunoblot analyses with mitofilin-specific antibodies, Immunofluorescence microscopy, fractionating of human osteosarcoma cells, and protease protection experiments with isolated mitochondria and mitoplasts indicate that mitofilin is an integral membrane protein of the inner mitochondrial membrane. S-35-labeled mitofilin is transported into isolated yeast mitochondria in a reaction that depends on the membrane potential across the inner mitochondrial membrane (Delta Psi). During mitochondrial in vitro import, mitofilin is proteolytically processed to the mature protein that is also detected in cellular fractions, indicating that the amino-terminal leader sequence is removed, Sequence analysis and our re suits suggest that mitofilin is anchored in the inner mitochondrial membrane with an amino-terminal transmembrane domain, while the majority of the protein is extruding into the intermembrane space. (C) 1997 Academic Press
The nuclear domain 10 (ND10) is disrupted by the human cytomegalovirus gene product IE1
No full textKorioth F, Maul GG, Plachter B, Stamminger T, Frey J. The nuclear domain 10 (ND10) is disrupted by the human cytomegalovirus gene product IE1. EXPERIMENTAL CELL RESEARCH. 1996;229(1):155-158.The nuclear domain 10 (ND10) is modified during the life cycle of a number of viruses. In this study we report the effect of infection with human cytomegalovirus (HCMV) on the ND10 proteins PML, Sp100, and NDP52. Immunofluorescence analyses revealed that 1-2 h after infection (p.i.) with HCMV the immediate early gene (IE) products IE1 and IE2 transiently colocalize with ND10 proteins. At 4 h p.i. the IE gene products were distributed throughout the nucleus, which was accompanied by a complete disruption of ND10, affecting all analyzed proteins. Transfection studies using different HCMV-cDNA expression plasmids revealed that the expression of IE1 alone was sufficient to induce this disruption. As reported for other ND10-modifying viral proteins, no direct interaction between IE1 and the analyzed ND10 proteins could be detected. The disruption of ND10 by HCMV IE1 is very similar to that described for HSV-1 ICP0. Although there is no sequence similarity between proteins, this observation might suggest similar functions in virus-host interactions. (C) 1996 Academic Press, Inc
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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