Karyotypic conservation in the mammalian order monotremata (subclass Prototheria).

abstract：:Insulator proteins orchestrate the three-dimensional organization of the genome. Insulators function by facilitating communications between regulatory sequences and gene promoters, allowing accurate gene transcription regulation during embryo development and cell differentiation. However, the role of insulator protein...

journal_title：Chromosoma

authors： Hsu SJ,Stow EC,Simmons JR,Wallace HA,Lopez AM,Stroud S,Labrador M

更新日期：2020-12-01 00:00:00

abstract：:The DNA of eukaryotic cells is organized in a complex with proteins, either as interphase chromatin or mitotic chromosomes. Nucleosomes, the structural subunits of chromatin, have long been considered as static structures, incompatible with processes occurring in chromatin. During the past few years it has become evid...

journal_title：Chromosoma

authors： Loidl P

更新日期：1994-12-01 00:00:00

abstract：:Four different inversion heterozygotes of maize were examined for the occurrence of synaptic adjustment. Three substages of pachytene were identified in synaptonemal complex (SC) spreads using side-by-side comparisons of chromosome squashes with two-dimensional spreads of SCs. In SC spreads, inversion loop frequency d...

journal_title：Chromosoma

authors： Anderson LK,Stack SM,Sherman JD

更新日期：1988-01-01 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：:We characterized four meiotic mutants of the fission yeast Schizosaccharomyces pombe by live observation of nuclear movement. Nuclei were stained with either the DNA-specific fluorescent dye Hoechst 33342 or jellyfish green fluorescent protein (GFP) fused with the N-terminal portion of DNA polymerase alpha. We first f...

journal_title：Chromosoma

authors： Hiraoka Y,Ding DQ,Yamamoto A,Tsutsumi C,Chikashige Y

更新日期：2000-01-01 00:00:00

abstract：:The polypurine/polypyrimidine (PuPy) tracts present in the human genome are known to be scattered among and within chromosomes. In PuPy tract sequences, triplex formation occurs readily under physiological conditions, leaving single-stranded DNAs capable of hybridization with complementary single-stranded DNAs and RNA...

journal_title：Chromosoma

authors： Ohno M,Fukagawa T,Lee JS,Ikemura T

更新日期：2002-09-01 00:00:00

abstract：:Experiments were designed to test whether nonrandom segregation of sister chromatids at mitosis has a role in the production of cell diversity during embryogenesis, Segregation was examined in vivo in retinal cells from embryonic chicks. Chromatids were labelled with bromouracil and stained by the fluorescence plus Gi...

journal_title：Chromosoma

authors： Morris VB

更新日期：1977-03-16 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：:Coilin, a molecular marker for Cajal bodies (CBs), is a phosphoprotein that contains a cryptic nucleolar localization signal and multiple interacting domains, such as the RG-box. Post-translational symmetrical dimethylation of arginines on the coilin RG-box is required for the recruitment of the survival motor neuron ...

journal_title：Chromosoma

authors： Tapia O,Bengoechea R,Berciano MT,Lafarga M

更新日期：2010-10-01 00:00:00

abstract：:DNA topology in histone- and protamine-depleted nuclei (nucleoids) from somatic cells, sperm, and spermatogenic cells was studied to determine if the superhelical configuration of DNA looped domains is altered during spermatogenesis. The expansion and contraction of nucleoid DNA was measured with a fluorescence micros...

journal_title：Chromosoma

authors： Risley MS,Einheber S,Bumcrot DA

更新日期：1986-01-01 00:00:00

abstract：:Human satellite DNAs I, II and IV were transcribed to yield radioactive complementary RNAs (cRNAs). These cRNAs were hybridised to metaphase chromosomes of man, chimpanzee (Pan troglodytes), gorilla (Gorilla gorilla) and orang utan (Pongo pygmaeus). The results of this in situ hybridisation were analysed quantitativel...

journal_title：Chromosoma

authors： Gosden JR,Mitchell AR,Seuanez HN,Gosden CM

更新日期：1977-09-27 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

abstract：:The kinetochore binds an evolutionarily conserved set of checkpoint proteins that function to monitor whether chromosomes have aligned properly at the spindle equator. Human cells contain two related protein kinases, hBUB1 and hBUBR1, that appear to have evolved from a single ancestral BUB1 gene. We generated hBUB1- a...

journal_title：Chromosoma

authors： Jablonski SA,Chan GK,Cooke CA,Earnshaw WC,Yen TJ

更新日期：1998-12-01 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：: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：: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：:The influence of the sex-reversal factor (Sxr) on X and Y chromosome pairing was examined by comparing males with "novel" and "standard" Sxr genotypes. The novel Sxr males were exceptional in carrying Sxr on their X rather than their Y chromosome, or homozygously on both their X and Y chromosomes, or on a Y chromosome...

journal_title：Chromosoma

authors： Tease C,Cattanach BM

更新日期：1989-03-01 00:00:00

abstract：:The W chromosome of the codling moth, Cydia pomonella, like that of most Lepidoptera species, is heterochromatic and forms a female-specific sex chromatin body in somatic cells. We collected chromatin samples by laser microdissection from euchromatin and W-chromatin bodies. DNA from the samples was amplified by degene...

journal_title：Chromosoma

authors： Fuková I,Traut W,Vítková M,Nguyen P,Kubícková S,Marec F

更新日期：2007-04-01 00:00:00

abstract：:Meiotic pairing has now been shown to require heterochromatic homology and to be sensitive to repeat number in both male and female Drosophila. The increased pairing ability of repetitive sequences could be one reason that most eukaryotes allow the accumulation of tandem repeated elements. This may well be a reflectio...

journal_title：Chromosoma

authors： Irick H

更新日期：1994-03-01 00:00:00

abstract：:The divergence of lineages leading to extant squamate reptiles (lizards, snakes, and amphisbaenians) and birds occurred about 275 million years ago. Birds, unlike squamates, have karyotypes that are typified by the presence of a number of very small chromosomes. Hence, a number of chromosome rearrangements might be ex...

journal_title：Chromosoma

authors： Pokorná M,Giovannotti M,Kratochvíl L,Kasai F,Trifonov VA,O'Brien PC,Caputo V,Olmo E,Ferguson-Smith MA,Rens W

更新日期：2011-10-01 00:00:00

abstract：:We studied the stability of the genomic distribution of six retrotransposon families in long-term and short-term cultures of Drosophila cells. In a subclone derived from Kc cells, no significant rearrangements were detected over an 8 year period. On the contrary, extensive reshuffling and amplification of transposon f...

journal_title：Chromosoma

authors： Junakovic N,Di Franco C,Best-Belpomme M,Echalier G

更新日期：1988-11-01 00:00:00

abstract：:Meiosis is a conserved cell division process that is used by sexually reproducing organisms to generate haploid gametes. Males and females produce different end products of meiosis: eggs (females) and sperm (males). In addition, these unique end products demonstrate sex-specific differences that occur throughout meios...

journal_title：Chromosoma

authors： Cahoon CK,Libuda DE

更新日期：2019-09-01 00:00:00

abstract：:Chromosomes were subjected to either prolonged hypotonic solution pretreatment or aging. Both conditions greatly loosened and dispersed the overlying epichromatin from the central chromosome core structure. This was followed by silver staining and examination with bright-field microscopy. The chromosome core selective...

journal_title：Chromosoma

authors： Howell WM,Hsu TC

更新日期：1979-06-21 00:00:00

abstract：:Spermatogenesis in the F1 hybrid (2n=24=12 female + 12 male) between the closely related newt species T. cristatus carnifex and T. marmoratus was apparently normal up to pachytene. Many unpaired chromosomes were present at diplotene and a typical diakinesis was lacking. Primary spermatocytes at meta- and meta-anaphase...

journal_title：Chromosoma

authors： Mancino G,Ragghianti M,Bucci-Innocenti S

更新日期：1979-08-10 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：: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：:Two families of tandemly repeated satellite DNAs were isolated from the neotropical primate Callimico goeldii (Goeldi's marmoset). One satellite, CgoA, is over 70% A + T and has a monomer length of 338 bp. The other satellite, CgoB, is 50% A + T and has a monomer length of 916 bp. Both CgoA and CgoB hybridize strongly...

journal_title：Chromosoma

authors： Fanning TG,Seuánez HN,Forman L

更新日期：1989-12-01 00:00:00

abstract：:The overall nuclease sensitivity and methylation of active and inactive X chromosomes of kangaroos were examined by in situ nick translation. Cultured fibroblasts of subspecies wallaroo-euro (Macropus robustus robustus; Macropus robustus erubescens) hybrids were used, enabling the paternally and maternally derived X c...

journal_title：Chromosoma

authors： Loebel DA,Johnston PG

更新日期：1993-01-01 00:00:00

abstract：:The hypothesis that the genome is composed of a patchwork of structural and functional domains (units) that may be either active or repressed was proposed almost 30 years ago. Here, we examine the evolution of the domain model of eukaryotic genome organization in view of the expansion of genome-scale techniques in the...

journal_title：Chromosoma

authors： Razin SV,Vassetzky YS

更新日期：2017-02-01 00:00:00

abstract：:From a "shotgun" collection of DNA fragments, isolated from Drosophila melanogaster, we selected sequences that function as autonomously replicating sequences (ARS) in the yeast Saccharomyces cerevisiae. To investigate the replicative potential of such sequences in Drosophila, five of these ARS elements and also the A...

journal_title：Chromosoma

authors： Roth GE

更新日期：1991-05-01 00:00:00