TY  - JOUR
A1  - Wilken, Norbert
A1  - Kossner, Ursula
A1  - Senécal, Jean-Luc
A1  - Scheer, Ulrich
A1  - Dabauvalle, Marie-Christine
T1  - Nup180, a novel nuclear pore complex protein localizing to the cytoplasmic ring and associated fibrils
N2  - No abstract available
Y1  - 1993
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-32049
ER  - 
TY  - CHAP
A1  - Zentgraf, Hanswalter
A1  - Scheer, Ulrich
A1  - Franke, Werner W.
T1  - On the existence of arrested transcriptional machinery in late stages of avian erythropoiesis
N2  - No abstract available
Y1  - 1976
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-33696
ER  - 
TY  - CHAP
A1  - Franke, Werner W.
A1  - Scheer, Ulrich
A1  - Spring, Herbert
A1  - Trendelenburg, Michael F.
A1  - Zentgraf, Hanswalter
T1  - Organization of nucleolar chromatin
N2  - No abstract available
Y1  - 1979
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-39410
ER  - 
TY  - CHAP
A1  - Franke, Werner W.
A1  - Scheer, Ulrich
A1  - Zentgraf, Hanswalter
A1  - Trendelenburg, Michael F.
A1  - Müller, U.
A1  - Krohne, G.
A1  - Spring, H.
T1  - Organization of transcribed and nontranscribed chromatin
N2  - No abstract available
KW  - Tumor / Zellteilung
Y1  - 1980
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-40656
ER  - 
TY  - JOUR
A1  - Franke, Werner W.
A1  - Scheer, Ulrich
A1  - Zentgraf, Hanswalter
T1  - Organization of transcriptionally active and inactive chromatin
N2  - No abstract available
KW  - Deutschland
KW  - Gefäßpflanzen
KW  - Verzeichnis
Y1  - 1984
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-40588
ER  - 
TY  - CHAP
A1  - Scheer, Ulrich
A1  - Spring, Herbert
A1  - Trendelenburg, Michael F.
T1  - Organization of transcriptionally active chromatin in lampbrush chromosome loops
N2  - No abstract available
Y1  - 1979
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-39293
ER  - 
TY  - CHAP
A1  - Franke, Werner W.
A1  - Scheer, Ulrich
T1  - Pathways of nucleocytoplasmic translocation of ribonucleoproteins
N2  - No abstract available
Y1  - 1974
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-33832
ER  - 
TY  - JOUR
A1  - Scheer, Ulrich
A1  - Trendelenburg, Michael F.
A1  - Franke, Werner W.
T1  - Regulation of transcription of genes of ribosomal RNA during amphibian oogenesis: a biochemical and morphological study
N2  - Natural changes in the transcription of rRNA genes were studied in nucleoli from three oogenic stages of the newt Triturus alpestris with electron microscope, autoradiographic, and biochemical techniques. From determinations of the uridine triphosphate pool sizes and [3H]uridine uptake, phosphorylation, and incorporation into 28S and 18S rRNAs in vivo it was estimated that the rate of rRNA synthesis was about 0.01% in previtellogenic oocytes and 13% in mature oocytes when compared to midvitellogenesis. Spread preparations of nucleoli showed significant morphological changes in the transcriptional complexes. The total number of lateral fibrils, i.e., ribonucleoproteins containing the nascent rRNA precursor, were drastically decreased in stages of reduced synthetic activity. This indicates that rRNA synthesis is regulated primarily at the level of transcription. The resulting patterns of fibril coverage of the nucleolar chromatin axes revealed a marked heterogeneity. On the same nucleolar axis occurred matrix units that were completely devoid of lateral fibrils, matrix units that were almost fully covered with lateral fibrils, and various forms of matrix units with a range of lateral fibril densities intermediate between the two extremes. Granular particles that were tentatively identified as RNA polymerase molecules were not restricted to the transcription l complexes. They were observed, although less regularly and separated by greater distances, in untranscribed spacer regions as well as in untranscribed gene intercepts. The results show that the pattern of transcriptional control of rRNA genes differs widely in different genes, even in the same genetic unit.
Y1  - 1976
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-32814
ER  - 
TY  - CHAP
A1  - Scheer, Ulrich
A1  - Trendelenburg, M. F.
A1  - Franke, Werner W.
T1  - Regulation of transcription of ribosomal RNA genes during amphibian oogenesis
N2  - No abstract available
Y1  - 1976
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-33700
ER  - 
TY  - JOUR
A1  - Hügle, Barbara
A1  - Scheer, Ulrich
A1  - Franke, Werner W.
T1  - Ribocharin: a nuclear M\(_r\) 40,000 protein specific to precursor particles of the large ribosomal subunit
N2  - Using a monoclonal antibody (No-194) we have identified, in Xenopus laevis and other amphibia, an acidic protein of M, 40,000 (ribocharin) which is specifically associated with the granular component of the nucleolus and nucleoplasmic 65S particles. These particles contain the nuclear 28S rRNA and apparently represent the precursor to the large ribosomal subunit in nucleocytoplasmic transit. By immunoelectron microscopy ribocharin has been localized in the granular component of the nucleolus and in interchromatin granules. During mitosis ribocharin-containing particles are associated with surfaces of chromosomes and are recollected in the reconstituting nucleoli in late telophase. We suggest that ribocharin is a specific component of precursor particles of the large ribosomal subunit, which dissociates from the 65S particle before passage through the nuclear envelope, and is reutilized in ribosome biogenesis.
Y1  - 1985
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-41169
ER  -