Cohesin gene defects may impair sister chromatid alignment and genome stability in Arabidopsis thaliana.

abstract：:MicroRNAs (miRNAs) were first discovered in genetic screens for regulators of developmental timing in the stem-cell-like seam cell lineage in Caenorhabditis elegans. As members of the heterochronic pathway, the lin-4 and let-7 miRNAs are required in the seam cells for the correct progression of stage-specific events a...

journal_title：Chromosoma

authors： Nimmo RA,Slack FJ

更新日期：2009-08-01 00:00:00

abstract：:Human neutrophil nuclei typically consist of three of four large heterochromatic lobes joined by thin, DNA-containing filaments. In addition, some lobes exhibit appendages of various sizes and shapes. Classical genetic and cytological studies suggest that some appendages contain specific chromosomes. The studies repor...

journal_title：Chromosoma

authors： Aquiles Sanchez J,Karni RJ,Wangh LJ

更新日期：1997-08-01 00:00:00

abstract：:Feulgen cytophotometric measurements of neuroblasts in the first and third instar larvae of Drosophila melanogaster reveal the same DNA content for metaphases with chromosomes of different size. The total absorbance of all measured metaphases gives the four-fold value of that of the spermatids. Accordingly there seem ...

journal_title：Chromosoma

authors： van de Flierdt K

更新日期：1975-01-01 00:00:00

abstract：:Rice (Oryza sativa L.) centromeres are composed of 155-bp satellite repeats (CentO), centromere-specific retrotransposon (CRR), and a variety of other repeats. Previous studies have shown that CentO and CRR elements are both parts of the functional centromere/kinetochore complex. In this study, a naturally occurring k...

journal_title：Chromosoma

authors： Wang G,Li H,Cheng Z,Jin W

更新日期：2013-08-01 00:00:00

abstract：:The number of RNA molecules per cell (transcriptome size) is highly variable, differing among and within cell types depending on cell size, stage of the cell cycle, ploidy level, age, disease state, and growth condition. Such variation has been observed at the level of total RNA, ribosomal RNA, messenger RNA (mRNA), a...

journal_title：Chromosoma

authors： Coate JE,Doyle JJ

更新日期：2015-03-01 00:00:00

abstract：:To understand how microtubules interact in forming the mitotic apparatus and orienting and moving chromosomes, the precise arrangement of microtubules in kinetochore fibers in Chinese hamster ovary cells was examined. Individual microtubules were traced, using high voltage electron microscopy of serial 0.25 micron sec...

journal_title：Chromosoma

authors： Witt PL,Ris H,Borisy GG

更新日期：1981-01-01 00:00:00

abstract：:In this work we have used the inhibitor of F-actin polymerisation cytochalasin B (Cyt B) to test the hypothesis that the contractile ring and the central spindle are mutually interdependent structures in mammalian mitotic cells. Double fluorescence staining of alpha-tubulin and F-actin was employed to analyse anaphase...

journal_title：Chromosoma

authors： Cimini D,Fioravanti D,Tanzarella C,Degrassi F

更新日期：1998-12-01 00:00:00

abstract：:Chromosome segregation in primary spermatocytes of the crane fly Nephrotoma suturalis was studied after exposure to Colcemid at doses that did not completely inhibit spindle formation. Colcemid was added either to the medium in which larvae were cultured or to Tricine buffer in which isolated testes were incubated. Pa...

journal_title：Chromosoma

authors： LaFountain JR Jr

更新日期：1985-01-01 00:00:00

abstract：:Micronuclei are extra-nuclear bodies mainly derived from ana-telophase lagging chromosomes/chromatins (LCs) that are not incorporated into primary nuclei at mitotic exit. Unlike primary nuclei, most micronuclei are enclosed by nuclear envelope (NE) that is highly susceptible to spontaneous and irreparable rupture. Rup...

journal_title：Chromosoma

authors： Guo X,Dai X,Wu X,Zhou T,Ni J,Xue J,Wang X

更新日期：2020-12-01 00:00:00

abstract：:By taking advantage of the fact that fluorescent light (FL) induces strand breaks only in bromodeoxyuridine(BrdUy-substituted DNA, and that those breaks eventually lead to the formation of sister chromatid exchanges (SCEs), the response of SCEs to FL was studied carefully in Chinese hamster chromosomes in which, out o...

journal_title：Chromosoma

authors： Kato H

更新日期：1977-02-03 00:00:00

abstract：:The study of RNA pol II-mediated transcription regulation has been dominated by molecular biological approaches. Although these methods continue to provide important insights, other approaches are required to insure against an oversimplified view of gene expression. Improvements in EM methods and the development of th...

journal_title：Chromosoma

authors： Hendzel MJ,Bazett-Jones DP

更新日期：1995-02-01 00:00:00

abstract：:An inverted duplication of chromosome 15 [inv dup(15)] is the most common supernumerary marker chromosome, comprising approximately 50% of all chromosomes in this class. Structurally, the inv dup(15) is a mirror image with the central axis defining a distal break within either the heterochromatic alpha-satellite array...

journal_title：Chromosoma

authors： Wandstrat AE,Schwartz S

更新日期：2000-11-01 00:00:00

abstract：:Sugar beet (Beta vulgaris) chromosomes consist of large heterochromatic blocks in pericentromeric, centromeric, and intercalary regions comprised of two different highly abundant DNA satellite families. To investigate DNA methylation at single base resolution at heterochromatic regions, we applied a method for strand-...

journal_title：Chromosoma

authors： Zakrzewski F,Weisshaar B,Fuchs J,Bannack E,Minoche AE,Dohm JC,Himmelbauer H,Schmidt T

更新日期：2011-08-01 00:00:00

abstract：:The eukaryotic genome can be roughly divided into euchromatin and heterochromatin domains that are structurally and functionally distinct. Heterochromatin is characterized by its high compaction that impedes DNA transactions such as gene transcription, replication, or recombination. Beyond its role in regulating DNA a...

journal_title：Chromosoma

authors： Nikolov I,Taddei A

更新日期：2016-06-01 00:00:00

abstract：:The genus Caledia acontains two species. C. species nova 1 is restricted to the Oriomo Plateau of S. W. Papua and has a complement of twelve telocentric chromosomes. The second species C. captiva has a much wider distribution pattern--from S.W. Papua in the North, down the entire Eastern seaboard of Australia to South...

journal_title：Chromosoma

authors： Shaw DD

更新日期：1976-02-23 00:00:00

abstract：:The haspins are divergent members of the eukaryotic protein kinase family that are conserved in many eukaryotic lineages including animals, fungi, and plants. Recently-solved crystal structures confirm that the kinase domain of human haspin has unusual structural features that stabilize a catalytically active conforma...

journal_title：Chromosoma

authors： Higgins JM

更新日期：2010-04-01 00:00:00

abstract：:Male hybrids of the cross D. azteca X D. athabasca are larger (hybrid giant males) than their parents, whereas hybrid females are of the same size as the parental species. Microspectrophotometric measurements have shown that the larval polytene salivary gland chromosomes of hybrid giant males undergo one more endorepl...

journal_title：Chromosoma

authors： Meer B

更新日期：1976-09-10 00:00:00

abstract：:Chromosome segregation ensures the equal partitioning of chromosomes at mitosis. However, long chromosome arms may pose a problem for complete sister chromatid separation. In this paper we report on the analysis of cell division in primary cells from field vole Microtus agrestis, a species with 52 chromosomes includin...

journal_title：Chromosoma

authors： Rens W,Torosantucci L,Degrassi F,Ferguson-Smith MA

更新日期：2006-12-01 00:00:00

abstract：:Chromosomal replication was studied by means of the BrdU-Höchst-Giemsa-technique in three minute T-cell leukemias with special regard to chromosome 15. In all the three leukemic cell lines the normally early replicating band 15 E was undetectable whereas late replication in this region is completely unaltered. Further...

journal_title：Chromosoma

authors： Somssich IE,Spira J,Hameister H,Klein G

更新日期：1982-01-01 00:00:00

abstract：:Fluorescent in situ hybridization with chromosome specific probes was used in conjunction with laser scanning confocal microscopy to assess the three-dimensional distribution of chromosomes in human T-lymphocyte nuclei. Cells in the G1-phase of the cell cycle exhibit a distinctly non-random chromosome organization:cen...

journal_title：Chromosoma

authors： Ferguson M,Ward DC

更新日期：1992-08-01 00:00:00

abstract：:We have used the polymerase chain reaction (PCR) technique to search the Drosophila melanogaster genome for the presence of sequences with homology to mammalian and yeast centromeric DNA. Using primers based on the human CENP-B box present in alpha-satellite DNA and part of the Saccharomyces cerevisiae CDEIII centrome...

journal_title：Chromosoma

authors： Coelho PA,Nurminsky D,Hartl D,Sunkel CE

更新日期：1996-10-01 00:00:00

abstract：:The evolutionary conservation of Y chromosomal DNA sequences of Drosophila hydei in different species of the genus Drosophila was studied by in situ hybridization and on genomic DNA blots of restriction enzyme digested DNA. We demonstrated that Y specific DNA sequences, which form major parts of lampbrush loops relate...

journal_title：Chromosoma

authors： Vogt P,Hennig W,ten Hacken D,Verbost P

更新日期：1986-01-01 00:00:00

abstract：:Microspore culture stimulates immature pollen grains to develop into plants via tissue culture and is used routinely in many crop species to produce "doubled haploids": homozygous, true-breeding lines. However, microspore culture is also often used on material that does not have stable meiosis, such as interspecific h...

journal_title：Chromosoma

authors： Mwathi MW,Schiessl SV,Batley J,Mason AS

更新日期：2019-12-01 00:00:00

abstract：:We have studied the diameter of chromatin fibres embedded in epoxy resins for three different materials: mouse thymus, chicken erythrocytes and sea cucumber spermatozoa. We confirm that the diameter of chromatin fibres increases with linker length, both values being influenced by the protein composition of chromatin. ...

journal_title：Chromosoma

authors： Alegre C,Subirana JA

更新日期：1989-06-01 00:00:00

abstract：:Using indirect immunofluorescence visualization techniques we investigated the distribution of RNA polymerase B (or II) and histone H1 at heat shock puff loci in Drosophila melanogaster polytene chromosomes at different times during and after heat shock. After heat treatments of from 5 to 45 min, the heat shock puff d...

journal_title：Chromosoma

authors： Greenleaf AL,Plagens U,Jamrich M,Bautz EK

更新日期：1978-01-16 00:00:00

abstract：:Macronuclear DNA of four hypotrichous and one holotrichous ciliate species was characterized by biochemical techniques. The renaturation kinetics of the macronuclear DNAs of all five species were similar. Repetitive sequences occur only in an amount below 2%. Although the DNA content of the macronuclei of the species ...

journal_title：Chromosoma

authors： Steinbrück G,Haas I,Hellmer KH,Ammermann D

更新日期：1981-01-01 00:00:00

abstract：:The spatial distribution of parental genomes has attracted much interest because intranuclear chromosome distribution can modulate the transcriptome of cells and influence the efficacy of meiotic homologue pairing. Pairing of parental chromosomes is imperative to sexual reproduction as it translates into homologue seg...

journal_title：Chromosoma

authors： Scherthan H,Schöfisch K,Dell T,Illner D

更新日期：2014-12-01 00:00:00

abstract：:In Drosophila as in many organisms beta tubulins are encoded by a gene family. We have determined the complete nucleotide sequences coding for the beta 1 and beta 2 tubulins of Drosophila melanogaster and the beta 2 tubulin of D. hydei, and found these insect beta tubulins to be highly conserved and like beta tubulins...

journal_title：Chromosoma

authors： Michiels F,Falkenburg D,Müller AM,Hinz U,Otto U,Bellmann R,Glätzer KH,Brand R,Bialojan S,Renkawitz-Pohl R

更新日期：1987-01-01 00:00:00

abstract：:In a variety of organisms, euchromatic genes brought into juxtaposition with pericentric heterochromatin show position-effect variegation (PEV), a silencing of gene expression in a subset of the cells in which the gene is normally expressed. Previously, a P-element mobilization screen identified transgenic Drosophila ...

journal_title：Chromosoma

authors： Cryderman DE,Cuaycong MH,Elgin SC,Wallrath LL

更新日期：1998-11-01 00:00:00

abstract：:Mutations in the MCPH1 gene result in primary microcephaly in combination with a unique cellular phenotype of defective chromosome condensation. MCPH1 patient cells display premature chromosome condensation in G2 phase of the cell cycle and delayed decondensation in early G1 phase, observable as an increased proportio...

journal_title：Chromosoma

authors： Arroyo M,Trimborn M,Sánchez A,Hirano T,Neitzel H,Marchal JA

更新日期：2015-12-01 00:00:00