The origin, meiotic behavior, and transmission of a novel minichromosome in Arabidopsis thaliana.

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：:In Drosophila gibberosa, differences between midgut and salivary gland chromosomes fall into two categories: tissue-specific band modulations which persist throughout the 90 h developmental period that we studied and tissue-specific puffs. Puffs that are common to both tissues tend to appear earlier in the midgut. Som...

journal_title：Chromosoma

authors： Roberts PA

更新日期：1988-11-01 00:00:00

abstract：:Telomeric DNA is present at the ends of eukaryotic chromosomes and is bound by telomere "capping" proteins, which are the (Cdc13-Stn1-Ten1) CST complex, Ku (Yku70-Yku80), and Rap1-Rif1-Rif2 in budding yeast. Inactivation of any of these complexes causes telomere "uncapping," stimulating a DNA damage response (DDR) tha...

journal_title：Chromosoma

authors： Dewar JM,Lydall D

更新日期：2012-04-01 00:00:00

abstract：:The reduction in chromosome number during meiosis is essential for the production of haploid germ cells and thereby fertility. To achieve this, homologous chromosomes are first synapsed together by a protein assembly, the synaptonemal complex (SC), which permits genetic exchange by crossing over and the subsequent acc...

journal_title：Chromosoma

authors： Dunne OM,Davies OR

更新日期：2019-09-01 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：:Chromosome paints of the rat kangaroo ( Aepyprymnus rufuscens, 2 n=32) were used to define chromosome regions in the long nosed potoroo ( Potorous tridactylus, 2 n=12 female, 13 male) karyotype and localize these regions in three-dimensionally preserved nuclei of the potoroo to test the hypothesis that marsupial chrom...

journal_title：Chromosoma

authors： Rens W,O'Brien PC,Graves JA,Ferguson-Smith MA

更新日期：2003-08-01 00:00:00

abstract：:BrdU-33258 Hoechst techniques have been used to characterize DNA replication patterns in lymphocytes from hunam females with supernumerary or structurally abnormal X chromosomes. Fluorescence analysis permits identification of late replicating X chromosomes in a very high proportion of cells and affords a high resolut...

journal_title：Chromosoma

authors： Latt SA,Willard HF,Gerald PS

更新日期：1976-08-17 00:00:00

abstract：:Heterochromatin in eukaryotic interphase cells frequently localizes to the nucleolar periphery (nucleolus-associated domains (NADs)) and the nuclear lamina (lamina-associated domains (LADs)). Gene expression in somatic cell NADs is generally low, but NADs have not been characterized in mammalian stem cells. Here, we g...

journal_title：Chromosoma

authors： Bizhanova A,Yan A,Yu J,Zhu LJ,Kaufman PD

更新日期：2020-06-01 00:00:00

abstract：:The best-studied Drosophila insulator complex consists of two BTB-containing proteins, the Mod(mdg4)-67.2 isoform and CP190, which are recruited cooperatively to chromatin through interactions with the DNA-binding architectural protein Su(Hw). While Mod(mdg4)-67.2 interacts only with Su(Hw), CP190 interacts with many ...

journal_title：Chromosoma

authors： Melnikova L,Kostyuchenko M,Molodina V,Parshikov A,Georgiev P,Golovnin A

更新日期：2018-03-01 00:00:00

abstract：:We present a general model for the evolution of chromosome-specific satellite DNA subfamilies. Sus scrofa domestica has a bimodal karyotype with two autosomal subsets of 12 meta-/submetacentric (Mc) and 6 acrocentric (Ac) chromosome types (Mc and Ac "subgenomes"). We show that the centromeric heterochromatin is charac...

journal_title：Chromosoma

authors： Jantsch M,Hamilton B,Mayr B,Schweizer D

更新日期：1990-09-01 00:00:00

abstract：:The molecular structure of chromatin during dogfish spermiogenesis was examined by electron microscopy after the dispersion of nuclei at low ionic strength. In early and late stages of differentiation (round and elongating spermatids), chromatin is globular, although basic nuclear proteins are different from those pre...

journal_title：Chromosoma

authors： Gusse M,Chevaillier P

更新日期：1980-01-01 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：:Saccharomyces cerevisiae cells containing null mutations in the SEP1 gene, which encodes the homologous pairing and strand exchange protein p175SEP1, enter pachytene with a delay. They arrest uniformly at this stage of meiotic prophase, probably revealing a checkpoint in the transition from pachytene to meiosis I. At ...

journal_title：Chromosoma

authors： Bähler J,Hagens G,Holzinger G,Scherthan H,Heyer WD

更新日期：1994-04-01 00:00:00

abstract：:In mammals, paternal and maternal pronuclei undergo profound chromatin reorganisation upon fertilisation. How these events are orchestrated within centromeric regions to ensure proper chromosome segregation in the following cellular divisions is unknown. In this study, we followed the dynamic unfolding of the centrome...

journal_title：Chromosoma

authors： Probst AV,Santos F,Reik W,Almouzni G,Dean W

更新日期：2007-08-01 00:00:00

abstract：:In the domestic pig (2n = 38) two types of constitutive heterochromatin can be differentiated by fluorescence counterstaining techniques. All 24 biarmed autosomes and the X chromosome have chromomycin A3-positive centromeric C-bands, whereas all 12 acrocentric chromosomes exhibit DA-DAPI-positive centromeric heterochr...

journal_title：Chromosoma

authors： Schwarzacher T,Mayr B,Schweizer D

更新日期：1984-01-01 00:00:00

abstract：:The organization of DNA in the mitotic metaphase and polytene chromosomes of the fungus gnat, Sciara coprophila, has been studied using base-specific DNA ligands, including anti-nucleoside antibodies. The DNA of metaphase and polytene chromosomes reacts with AT-specific probes (quinacrine, DAPI, Hoechst 33258 and anti...

journal_title：Chromosoma

authors： Eastman EM,Goodman RM,Erlanger BF,Miller OJ

更新日期：1980-01-01 00:00:00

abstract：:DNA double-strand breaks arise accidentally upon exposure of DNA to radiation and chemicals or result from faulty DNA metabolic processes. DNA breaks can also be introduced in a programmed manner, such as during the maturation of the immune system, meiosis, or cancer chemo- or radiotherapy. Cells have developed a vari...

journal_title：Chromosoma

authors： Ranjha L,Howard SM,Cejka P

更新日期：2018-06-01 00:00:00

abstract：:A crucial step during eukaryotic initiation of DNA replication is the correct loading and activation of the replicative DNA helicase, which ensures that each replication origin fires only once. Unregulated DNA helicase loading and activation, as it occurs in cancer, can cause severe DNA damage and genomic instability....

journal_title：Chromosoma

authors： Tognetti S,Riera A,Speck C

更新日期：2015-03-01 00:00:00

abstract：:In most multicellular eukaryotes, synapsis [synaptonemal complex (SC) formation] between pairs of homologous chromosomes during prophase I of meiosis is closely linked with crossing over. Asynaptic mutants in plants have reduced synapsis and increased univalent frequency, often resulting in genetically unbalanced game...

journal_title：Chromosoma

authors： Qiao H,Offenberg HH,Anderson LK

更新日期：2012-06-01 00:00:00

abstract：:The MRE11/RAD50/NBS1 complex (Mre11 complex) is a central player in most aspects of the cellular response to DNA double-strand breaks, including homologous recombination, non-homologous end joining, telomere maintenance and DNA damage checkpoint activation. Several of these findings are explained by the unusual enzyma...

journal_title：Chromosoma

authors： Assenmacher N,Hopfner KP

更新日期：2004-10-01 00:00:00

abstract：:The chromosomes of lake trout (Salvelinus namaycush) contain a considerable amount of heterochromatin located at the centromeres and/or telomeres of several chromosomes, including a sex-specific block located distally on the X chromosome. In order to investigate further the repetitive DNAs of lake trout, genomic DNA f...

journal_title：Chromosoma

authors： Reed KM,Phillips RB

更新日期：1995-12-01 00:00:00

abstract：:The hsp70, hsp83, hsromega, and the small heat shock protein genes were mapped on the polytene chromosomes of six species, representative of the geographical distribution of the Drosophila montium subgroup of the melanogaster species group. In addition, based on hybridization conditions, the putative locus of the hsp6...

journal_title：Chromosoma

authors： Drosopoulou E,Konstantopoulou I,Scouras ZG

更新日期：1996-08-01 00:00:00

abstract：:The 1C DNA-content of isolated nuclei of postembryonic stages of Tetranychus urticae stained with the classic and a modified Schiff's reagent was cytophotometrically estimated as 0.1 pg, a low value in animals. For many tissues of this arrhenotokous species the ploidy ratio between males and females is 1:2, indicating...

journal_title：Chromosoma

authors： Tempelaar MJ

更新日期：1980-01-01 00:00:00

abstract：:Using electron spectroscopic imaging, a new type of small granular structural constituent has been observed in the extrachromosomal zone of the polytene nucleus of the salivary gland cells of Chironomus thummi and Chironomus tentans. These granules appear isolated or in small clumps and are often seen to be connected ...

journal_title：Chromosoma

authors： Vázquez-Nin GH,Echeverría OM,Rouelle-Rossier VB,Fakan S

更新日期：1993-12-01 00:00:00

abstract：:Spermatogenic cells of the mouse have been separated by gravity sedimentation using a modification of a previously published method. Details are given for the collection of purified samples of specific meiotic stages and for the collection of labelled cell fractions following injection of 3H-thymidine. Suppression of ...

journal_title：Chromosoma

authors： Chandley AC,Hotta Y,Stern H

更新日期：1977-07-08 00:00:00

abstract：:Meiotic pairing and segregation were studied in three different heterozygous reciprocal translocation strains of the baker's yeast, Saccharomyces cerevisiae. Pachytene translocation quadrivalents were identified by a combination of immunofluorescence and fluorescence in situ hybridization and the karyotypes of meiotic...

journal_title：Chromosoma

authors： Loidl J,Jin QW,Jantsch M

更新日期：1998-09-01 00:00:00

abstract：:Ribosomal DNA nontranscribed spacers in Drosophila virilis DNA have been examined in some detail by restriction site analysis of cloned segments of rDNA, nucleic acid hybridizations involving unfractionated rDNA, and base composition estimates. The overall G + C content of the spacer is 27--28%; this compares with 39%...

journal_title：Chromosoma

authors： Rae PM,Barnett T,Murtif VL

更新日期：1981-01-01 00:00:00

abstract：:A cytological procedure for in vitro chromosome delineation has been studied using human and mouse (Mus musculus) chromosomes. This method, consisting of slide incubation in KMnO4 at 0--5 degrees C for 24 h followed by a short exposure to NaHSO3 (1--3 min) and Giemsa staining, induces extraction of chromatin from huma...

journal_title：Chromosoma

authors： Drets ME,Novello A

更新日期：1980-01-01 00:00:00

abstract：:A system has been developed using a microscope photometer to measure the DNA content of individual chromosomes. After correcting for the systematic and statistical errors the measured values are highly reproducible. Data are presented of measurements of human Y chromosomes from a cytogenetically normal population. Whe...

journal_title：Chromosoma

authors： Wall WJ,Butler LJ

更新日期：1989-01-01 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