Demonstration of replication patterns in the last premeiotic S-phase of male Chinese hamsters after BrdU pulse labeling.

abstract：:The heterochromatin of chromosomes 2 and 3 of Drosophila melanogaster contains about 30 essential genes defined by genetic analysis. In the last decade only a few of these genes have been molecularly characterized and found to correspond to protein-coding genes involved in important cellular functions. Moreover, sever...

journal_title：Chromosoma

authors： Corradini N,Rossi F,Vernì F,Dimitri P

更新日期：2003-07-01 00:00:00

abstract：:Regulation of DNA replication is critical, and loss of control can lead to DNA amplification. Naturally occurring, developmentally regulated DNA amplification occurs in the DNA puffs of the late larval salivary gland giant polytene chromosomes in the fungus fly, Sciara coprophila. The steroid hormone ecdysone induces ...

journal_title：Chromosoma

authors： Foulk MS,Waggener JM,Johnson JM,Yamamoto Y,Liew GM,Urnov FD,Young Y,Lee G,Smith HS,Gerbi SA

更新日期：2013-03-01 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：:In the parasitic wasp Nasonia vitripennis, certain males carry a B chromosome, called PSR (paternal sex ratio), which causes the compaction and subsequent loss of the paternal chromosomes in fertilized eggs. Because Nasonia are haplo-diploid, this leads to the production of all-male broods. Three families (PSR2, PSR18...

journal_title：Chromosoma

authors： Eickbush DG,Eickbush TH,Werren JH

更新日期：1992-08-01 00:00:00

abstract：:Compelling evidence has been obtained in favour of the idea that the nuclear surface of higher plant cells is a microtubule-nucleating and/or organizing site (MTOC), in the absence of defined centrosomes. How these plant MTOC proteins are redistributed and function during the progression of the cell cycle remains enti...

journal_title：Chromosoma

authors： Schmit AC,Stoppin V,Chevrier V,Job D,Lambert AM

更新日期：1994-09-01 00:00:00

abstract：:The immunodeficiency, centromeric region instability, facial anomalies (ICF) syndrome is a rare autosomal recessive disease. Usually, it is caused by mutations in the DNA methyltransferase 3B gene, which result in decreased methylation of satellite DNA in the juxtacentromeric heterochromatin at 1qh, 16qh, and 9qh. Sat...

journal_title：Chromosoma

authors： Gisselsson D,Shao C,Tuck-Muller CM,Sogorovic S,Pålsson E,Smeets D,Ehrlich M

更新日期：2005-07-01 00:00:00

abstract：:We provide evidence that centromere-specific 155 bp DNA repeats terminate one pair of telomeres at the telocentric, left end of the short fourth chromosome in Chironomus pallidivittatus. Earlier evidence indicated that all other telomeres are terminated by 340 bp telomere-specific repeats. DNA that borders the 155 bp ...

journal_title：Chromosoma

authors： Rosén M,Castillejo-López C,Edström JE

更新日期：2002-02-01 00:00:00

abstract：:To structurally dissect mitotic chromosomes, we aim to position along the folded chromatin fiber proteins involved in long-range order, such as topoisomerase IIalpha (topoIIalpha) and condensin. Immuno-electron microscopy (EM) of thin-sectioned chromosomes is the method of choice toward this goal. A much-improved immu...

journal_title：Chromosoma

authors： Maeshima K,Eltsov M,Laemmli UK

更新日期：2005-11-01 00:00:00

abstract：:Cytogenetic analysis indicates that Balbiani Ring 2 (BR 2) in the two sibling species Chironomus tentans and Chironomus pallidivittatus arises from identifically banded segments in the salivary gland polytene chromosomes, although chromosomal rearrangements have occurred. In situ hybridization of BR 2 RNA to the polyt...

journal_title：Chromosoma

authors： Lambert B,Beermann W

更新日期：1975-01-01 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：:Triplet conjugation occurs frequently when three different mating types of T. thermophila are mixed under appropriate conditions. Genetic studies show that fertilization is usually tripolar, with each conjugant contributing a pronucleus to one mate and receiving a pronucleus from the other. Triplets are less common an...

journal_title：Chromosoma

authors： Preparata RM,Nanney DL

更新日期：1977-03-07 00:00:00

abstract：:Nucleolar matrix structures were obtained under different extraction conditions from highly purified isolated nucleoli. Their ultrastructural appearance, protein composition and capacity to bind rDNA preferentially were studied in a model binding system. A region spanning approximately 25 kb in the rat ribosomal gene ...

journal_title：Chromosoma

authors： Stephanova E,Stancheva R,Avramova Z

更新日期：1993-03-01 00:00:00

abstract：:The cotyledon parenchyma cells of common bean (Phaseolus vulgaris L.) produce large quantities of storage proteins during embryo maturation; throughout this period, these cells also accumulate nuclear DNA (nDNA). To investigate the basis of this nDNA accumulation, we have measured storage protein mRNA pools, nDNA mass...

journal_title：Chromosoma

authors： Johnson KA,Sussex IM

更新日期：1990-07-01 00:00:00

abstract：:Macronuclear DNA was isolated from Paramecium primaurelia, stock 168. Although the macronucleus is polyploid to the extent of 840C, in other respect the DNA appears to be simply organized, having neither satellite sequences nor substantial amounts of intermediately repetitive sequence. The sequence complexity of macro...

journal_title：Chromosoma

authors： McTavish C,Sommerville J

更新日期：1980-01-01 00:00:00

abstract：:Nucleosome assembly involves deposition of a heterotetramer of histones H3/H4 onto DNA followed by two heterodimers of histones H2A/H2B. Cycles of nucleosome assembly and disassembly are essential to cellular events such as replication, transcription, and DNA repair. After synthesis in the cytoplasm, histones are shut...

journal_title：Chromosoma

authors： Mousson F,Ochsenbein F,Mann C

更新日期：2007-04-01 00:00:00

abstract：:In wild-type Drosophila hydei (genotype X/Y) four different primary spermatocyte nuclear glycoproteins, classified as non-Y encoded because of their occurrence in X/O genotypes, were demonstrated to possess a few epitopes that depended on formation of the Y chromosomal giant lampbrush loops threads (th; Mr 55,000 prot...

journal_title：Chromosoma

authors： Tischendorf G,Liebrich W,Trapitz P,Wood G,Schwochau M

更新日期：1989-08-01 00:00:00

abstract：:Macronuclear DNA was isolated from purified macronuclei of Paramecium aurelia and the size distribution was determined with regard to growth phase and method of extraction. DNA molecules as long as 105 microns and as short as 0.2 microns were observed. It was concluded that the method of extraction affected the observ...

journal_title：Chromosoma

authors： Cummings DJ

更新日期：1975-12-10 00:00:00

abstract：:The X and Y chromosomes of the musk shrew are the two largest in the complement and they regularly form a single chiasma during meiosis. This chiasma is located in the short arms of the X and Y, both of which show partial C-banding at meiosis. The in vitro incorporation of 5-bromodeoxyuridine/tritiated thymidine durin...

journal_title：Chromosoma

authors： Raman R,Nanda I

更新日期：1986-01-01 00:00:00

abstract：:After selective enrichment and differential hybridisation of Cot-1 DNA fractions of plants with and without polymorphic heterochromatic segments, a repetitive sequence (called Bds1) specific to the polymorphic chromosome segments of Brachycome dichromosomatica (Brachyscome dichromosomatica) was isolated. A single repe...

journal_title：Chromosoma

authors： Houben A,Wanner G,Hanson L,Verlin D,Leach CR,Timmis JN

更新日期：2000-06-01 00:00:00

abstract：:Polo-like kinase 1 (Plk1) and Aurora A play key roles in centrosome maturation, spindle assembly, and chromosome segregation during cell division. Here we show that the functions of these kinases during early mitosis are coordinated through Bora, a partner of Aurora A first identified in Drosophila. Depletion of human...

journal_title：Chromosoma

authors： Chan EH,Santamaria A,Silljé HH,Nigg EA

更新日期：2008-10-01 00:00:00

abstract：:Almost half of the human genome consists of repetitive DNA. Understanding what role these elements have in setting up chromatin states that underlie gene and chromosome function in complex genomes is paramount. The function of some types of repetitive DNA is obvious by virtue of their location, such as the alphoid arr...

journal_title：Chromosoma

authors： Chadwick BP

更新日期：2009-12-01 00:00:00

abstract：:The ribosome is responsible for the final step of decoding genetic information into proteins. Therefore, correct assembly of ribosomes is a fundamental task for all living cells. In eukaryotes, the construction of the ribosome which begins in the nucleolus requires coordinated efforts of >350 specialized factors that ...

journal_title：Chromosoma

authors： Gerhardy S,Menet AM,Peña C,Petkowski JJ,Panse VG

更新日期：2014-08-01 00:00:00

abstract：:The ability to reproduce is a major trait of living organisms. This ability is carried out by specialized reproductive cells-gametes. In mammals, gametes develop through a unique developmental pathway. Extensive changes in the epigenome of gametes occur during embryonic development. With birth, gametes continue to mat...

journal_title：Chromosoma

authors： Wasserzug-Pash P,Klutstein M

更新日期：2019-09-01 00:00:00

abstract：:The time sequence of DNA replication in partially synchronized human amniotic fluid cells has been analysed, employing BrdU incorporation techniques.--Regardless of the interval between removal of the methotrexate/uridine block and addition of BrdU during S-phase, the treatment results in an R-type replication pattern...

journal_title：Chromosoma

authors： Schempp W,Vogel W

更新日期：1978-06-28 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：:Engineered minichromosomes provide efficient platforms for stacking transgenes in crop plants. Methods for modifying these chromosomes in vivo are essential for the development of customizable systems for the removal of selection genes or other sequences and for the addition of new genes. Previous studies have demonst...

journal_title：Chromosoma

authors： Gaeta RT,Masonbrink RE,Zhao C,Sanyal A,Krishnaswamy L,Birchler JA

更新日期：2013-06-01 00:00:00

abstract：:Formation of stable kinetochore-microtubule attachments is essential for accurate chromosome segregation in human cells and depends on the NDC80 complex. We recently showed that Chmp4c, an endosomal sorting complex required for transport protein involved in membrane remodelling, localises to prometaphase kinetochores ...

journal_title：Chromosoma

authors： Petsalaki E,Dandoulaki M,Zachos G

更新日期：2018-12-01 00:00:00

abstract：:Minute elements detected in Megaselia scalaris (Phoridae, Diptera) lack chromosome arms but carry centromeres and possess kinetochore microtubules in mitosis as well as in meiosis. These centromere-like elements (CLEs) were present in two geographically independent strains of the fly. This indicates that their origin ...

journal_title：Chromosoma

authors： Wolf KW,Mertl HG,Traut W

更新日期：1991-11-01 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：: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