Distribution of 18+28S ribosomal genes in mammalian genomes.

abstract：:Aedes aegypti spermatocytes were reconstructed from electron micrographs. The species has tight somatic pairing of the chromosomes, and there are therefore no classical leptotene and zygotene stages, but rather a gradual transition from somatic pairing to meiotic pairing (= pachytene). The term "prepachytene" has been...

journal_title：Chromosoma

authors： Wandall A,Svendsen A

更新日期：1985-01-01 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：: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：: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 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：: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：: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：:Evidence is presented that chromosome ends are attached to the nuclear envelope prior to the formation of axial cores during early meiotic prophase in the grasshopper Brachystola magna. The attachment sites of distal and proximal chromosome ends are clustered in a small region of the inner nuclear envelope resulting i...

journal_title：Chromosoma

authors： Church K

更新日期：1976-11-29 00:00:00

abstract：:The distribution patterns of chromosomal proteins from Drosophila can be observed by immunofluorescent staining of the polytene chromosomes from larval salivary glands. We have purified a non-histone chromosomal protein of Mr = 69,000 molecular weight which has a high affinity for DNA with little sequence specificity....

journal_title：Chromosoma

authors： Fleischmann G,Filipski R,Elgin SC

更新日期：1987-01-01 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：:The sex chromosomes in Sauropsida (reptiles and birds) have evolved independently many times. They show astonishing diversity in morphology ranging from cryptic to highly differentiated sex chromosomes with male (XX/XY) and female heterogamety (ZZ/ZW). Comparing such diverse sex chromosome systems thus provides unpara...

journal_title：Chromosoma

authors： Matsubara K,O'Meally D,Azad B,Georges A,Sarre SD,Graves JA,Matsuda Y,Ezaz T

更新日期：2016-03-01 00:00:00

abstract：:Among his many contributions to the field of chromosome structure and dynamics, J. Herbert Taylor showed that eukaryotic cells have many more potential replication origins than they use, which they can recruit when replication forks are slowed to complete S-phase in a timely fashion. Thirty years later, his findings r...

journal_title：Chromosoma

authors： Gilbert DM

更新日期：2007-08-01 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：:While many studies have provided significant insight into homolog pairing during meiosis, information on non-homologous pairing is much less abundant. In the present study, fluorescence in situ hybridization (FISH) was used to investigate non-homologous pairing in haploid rice during meiosis. At pachytene, non-homolog...

journal_title：Chromosoma

authors： Gong Z,Liu X,Tang D,Yu H,Yi C,Cheng Z,Gu M

更新日期：2011-02-01 00:00:00

abstract：:The two-hybrid system was used to identify proteins that interact with the central conserved domain of Saccharomyces cerevisiae DNA topoisomerase I. Several different C-terminal domain-containing fragments of topoisomerase I, none of which overlapped with the central domain, were identified as specific interacting pol...

journal_title：Chromosoma

authors： Park H,Sternglanz R

更新日期：1998-06-01 00:00:00

abstract：:The chromatin protein Polycomb (PC) is necessary for keeping homeotic genes repressed in a permanent and heritable manner. PC is part of a large multimeric complex (PcG proteins) involved in generating silenced chromatin domains at target genes, thus preventing their inappropriate expression. In order to assess the in...

journal_title：Chromosoma

authors： Dietzel S,Niemann H,Brückner B,Maurange C,Paro R

更新日期：1999-05-01 00:00:00

abstract：:Isolated nuclei of the unicellular alga Olisthodiscus luteus, the uninucleate dinoflagellate Crypthecodinium cohnii and the binucleate dinoflagellate Peridinium balticum were lysed and deposited on grids by the microcentrifugation technique. The ultrastructure of the released chromatin fibers was compared to that of m...

journal_title：Chromosoma

authors： Rizzo PJ,Burghardt RC

更新日期：1980-01-01 00:00:00

abstract：:A plant carrying a small extra chromosome was found in Landsberg erecta ecotype of Arabidopsis thaliana. Fluorescence in situ hybridization revealed that this minichromosome was derived from the short arm of chromosome 4. The size of this "mini4S" chromosome was estimated to be approximately 7.5 Mb on the basis of pre...

journal_title：Chromosoma

authors： Murata M,Shibata F,Yokota E

更新日期：2006-08-01 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：:The preferred positions for meiotic double-strand breakage were mapped on Saccharomyces cerevisiae chromosomes I and VI, and on a number of yeast artificial chromosomes carrying human DNA inserts. Each chromosome had strong and weak double-strand break (DSB) sites. On average one DSB-prone region was detected by pulse...

journal_title：Chromosoma

authors： Klein S,Zenvirth D,Dror V,Barton AB,Kaback DB,Simchen G

更新日期：1996-12-01 00:00:00

abstract：:Human lymphocytes were grown for one replication cycle in BrdU, stained with 33258 Hoechst, exposed to UV light and subsequently treated with 2 x SSC and stained with Giemsa. This technique differentially stains the constitutive heterochromatin of chromosomes 1, 9, 15, 16, and the Y. In the heterochromatin of chromoso...

journal_title：Chromosoma

authors： Angell RR,Jacobs PA

更新日期：1975-08-11 00:00:00

abstract：:Nuclear and cytoplasmic RNA of Stylonychia mytilus were analyzed on denaturing polyacrylamide gels. The molecular weight of rRNA precursor molecules is within a range of 2.1 x 10(6) daltons. A comparison between the electrophoretic pattern of nuclear non-ribosomal RNA and cytoplasmic mRNA indicates that a considerable...

journal_title：Chromosoma

authors： Nock A

更新日期：1981-01-01 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：: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：:The distribution of constitutive heterochromatin has been investigated in four chromosomal races of the grasshopper Caledia captiva (2n=23 male/24 female) by the C-banding technique. Each of the four races was found to have a distinctive banding pattern which is associated with the inter-racial differences in chromoso...

journal_title：Chromosoma

authors： Shaw DD,Webb GC,Wilkinson P

更新日期：1976-06-30 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 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 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：: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：:Metaphase chromosomes prepared from colcemid-treated mouse L929 cells by non-ionic detergent lysis exhibit distinct heterochromatic centromere regions and associated kinetochores when viewed by whole mount electron microscopy. Deoxyribonuclease I treatment of these chromosomes results in the preferential digestion of ...

journal_title：Chromosoma

authors： Rattner JB,Krystal G,Hamkalo BA

更新日期：1978-04-25 00:00:00