Homology of Balbiani ring DNA in two closely related Chironomus species.

abstract：:The frequency and distribution of chiasmata and the nature of terminal "associations" was re-examined in Syrian hamster spermatocytes using the 5-bromo-2'-deoxyuridine (BrdU) antibody technique (BAT) for differential chromatid labelling. Differential chromatid substitution was achieved by BrdU incorporation at the pen...

journal_title：Chromosoma

authors： Latos-Bielenska A,Vogel W

更新日期：1990-08-01 00:00:00

abstract：:Chromosome behaviour during meiosis in male Syrian hamsters heterozygous for one of three translocations was analysed as part of a study of the transmission of these structural changes. Synapsis was studied using preparations of synaptonemal complexes, and chiasmate associations and the results of anaphase I segregati...

journal_title：Chromosoma

authors： Cawood AH,Breckon G

更新日期：1989-10-01 00:00:00

abstract：:In 1906, the Spanish neurobiologist Santiago Ramón y Cajal was awarded the Nobel Prize in Physiology or Medicine in recognition of his work on the structure of neurons and their connections. Cajal is commonly regarded as the father of modern neuroscience. What is less well known is that Cajal also had a great interest...

journal_title：Chromosoma

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

更新日期：2009-08-01 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：: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：: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：:This investigation was conducted to determine the relationship between Y chromosome loss and increased micronucleus formation with age. We also investigated the status of kinetochore proteins in the micronuclei. Umbilical cord blood samples were obtained from 18 newborn males, and peripheral blood was obtained from 35...

journal_title：Chromosoma

authors： Nath J,Tucker JD,Hando JC

更新日期：1995-07-01 00:00:00

abstract：:A clone of highly repetitive DNA, designated C5, was isolated from DNA of female Chinese muntjac cells. The nucleotide sequence of this clone is 80%-85% homologous to that of the satellite IA clone and other highly repetitive DNA clones previously obtained from the Indian muntjac. Using C5 as a probe for in situ hybri...

journal_title：Chromosoma

authors： Lin CC,Sasi R,Fan YS,Chen ZQ

更新日期：1991-10-01 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：:In Drosophila, the Polycomb group and trithorax group proteins play a critical role in controlling the expression states of homeotic gene complexes during development. The common view is that these two classes of proteins bind to the homeotic complexes and regulate transcription at the level of chromatin. In the prese...

journal_title：Chromosoma

authors： Fanti L,Perrini B,Piacentini L,Berloco M,Marchetti E,Palumbo G,Pimpinelli S

更新日期：2008-02-01 00:00:00

abstract：:The appearance of RNP droplets associated with specific regions of polytene chromosomes from Chironomus larvae has been studied, systematically by light microscopy using glutarladehyde fixation and lactic acid squashing of the salivary gland. During the fourth larval instar the highest frequency of nuclei which contai...

journal_title：Chromosoma

authors： Stockert JC,Díez JL

更新日期：1979-09-01 00:00:00

abstract：:Anaphase lagging of autosomes was observed in 6.1 +/- 5.4% of the primary spermatocytes in untreated larvae of the crane fly, Nephrotoma suturalis. Lagging was induced by exposure of larvae to 6 degrees C and during recovery at 22 degrees C from exposure to 0.2, 2, and 6 degrees C. The incidence of anaphase lag was ma...

journal_title：Chromosoma

authors： Janicke MA,LaFountain JR Jr

更新日期：1982-01-01 00:00:00

abstract：:The large-scale primary structure of the centromeric region of rice chromosome 5 was analyzed, the first example in a cereal species. The yeast artificial chromosome (YAC) and bacterial artificial chromosome (BAC) contigs aligned on the centromere of rice chromosome 5 (CEN5) covered a distance of more than 670 kb. Str...

journal_title：Chromosoma

authors： Nonomura K,Kurata N

更新日期：2001-08-01 00:00:00

abstract：:Exposure of Nyctotherus ovalis to low temperatures or vinblastine caused similar reactions of "classes" of microtubules (mt) present in the mitotic micronucleus of this ciliate towards both treatments. However, differences of sensitivity between certain "classes" of mt at individual mitotic stages exist. Unlike the ki...

journal_title：Chromosoma

authors： Eichenlaub-Ritter U,Ruthmann A

更新日期：1982-01-01 00:00:00

abstract：:The nuclear topography of pericentromeric DNA of chromosome 11 was analyzed in G0 (nonstimulated) and G1 [phytohemagglutinin (PHA) stimulated] human lymphocytes by confocal microscopy. In addition to the nuclear center, the centrosome was used as a second point of reference in the three-dimensional (3D) analysis. Peri...

journal_title：Chromosoma

authors： Hulspas R,Houtsmuller AB,Krijtenburg PJ,Bauman JG,Nanninga N

更新日期：1994-07-01 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：:Using BrdU/Hoechst 33258/Giemsa methods for detecting replicating chromosome bands, a method is described by which the DNA synthesis phase may be sub-divided on the basis of distinctive patterns displayed by certain chromosomes.--Applied to asynchronous populations successively sampled through one cell cycle, cells in...

journal_title：Chromosoma

authors： Savage JR,Bhunya SP

更新日期：1980-01-01 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：:We studied the karyotype of specimens of Callithrix emiliae (Callithricidae, Primates) from Rondonia, Brazil. Comparison with the karyotype of Callithrix jacchus showed that, even though these two species show many karyotypic similarities, they differ by a Robertsonian translocation, a paracentric inversion and large-...

journal_title：Chromosoma

authors： de Souza Barros RM,Nagamachi CY,Pieczarka JC

更新日期：1990-10-01 00:00:00

abstract：:Genomic sequencing reveals similar but limited numbers of protein-coding genes in different genomes, which begs the question of how organismal diversities are generated. Alternative pre-mRNA splicing, a widespread phenomenon in higher eukaryotic genomes, is thought to provide a mechanism to increase the complexity of ...

journal_title：Chromosoma

authors： Zhou Z,Fu XD

更新日期：2013-06-01 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：:The ribosomal DNA(rDNA)-containing chromatin in eukaryotes forms a unique architecture called the "secondary constriction" or "nucleolus organiser region (NOR)" on mitotic chromosomes. To gain more insight into non-histone chromosomal proteins (NHCP), termed "N-band proteins", that are specifically associated with the...

journal_title：Chromosoma

authors： Matsui S,Fuke M,Chai L,Sandberg AA,Elassouli S

更新日期：1986-01-01 00:00:00

abstract：:Polo-like kinase 1 (Plk1) is an essential mitotic regulator and undergoes periodic phosphorylation on threonine 210, a conserved residue in the kinase's activation loop. While phosphate-mimicking alterations of T210 stimulate Plk1's kinase activity in vitro, their effects on cell cycle regulation in vivo remain contro...

journal_title：Chromosoma

authors： Paschal CR,Maciejowski J,Jallepalli PV

更新日期：2012-12-01 00:00:00

abstract：:We sought for cloned sequences of middle repetitive (MR) complexity that mark obligatory heterochromatic regions. Total genome probes were employed in a differential screening procedure to recover X-specific, Y-specific and autosomal specific heterochromatic sequences. X-and Y-linked sequences were recovered in the sa...

journal_title：Chromosoma

authors： Lifschytz E,Hareven D

更新日期：1982-01-01 00:00:00

abstract：:P elements, a family of DNA transposons, are known as aggressive intruders into the hitherto uninfected gene pool of Drosophila melanogaster. Invading through horizontal transmission from an external source they managed to spread rapidly through natural populations within a few decades. Owing to their propensity for r...

journal_title：Chromosoma

authors： Pinsker W,Haring E,Hagemann S,Miller WJ

更新日期：2001-07-01 00:00:00

abstract：:We describe a method for preparing nuclear spreads from cells of live, unfixed zebrafish embryos at the late-gastrula (approximately 8000 cell) stage of development. The method consists of a sequence of four steps: (1) a slow, gentle lysis, in low to moderate salt concentration, of cells and then nuclei, to release DN...

journal_title：Chromosoma

authors： Chan DW,Yager TD

更新日期：1998-03-01 00:00:00

abstract：:In the XY pachytene spermatocyte, the sex chromosomes do not synapse except for the pseudoautosomal region and become transcriptionally silenced. It has been suggested that the meiotic silencing of unsynapsed chromatin (MSUC) also occurs in oocytes. In the XY sex-reversed female mouse, the sex chromosomes fail to pair...

journal_title：Chromosoma

authors： Taketo T,Naumova AK

更新日期：2013-10-01 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：: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：: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