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Mostrando 981 - 1,000 Resultados de 1,767 Para Buscar '"Xenopus laevis"', tiempo de consulta: 0.21s Limitar resultados
  1. 981
    Publicado 1988
    “…As the oocytes of Xenopus laevis grow and develop they accumulate vast stores of mRNA for use during early embryogenesis. …”
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    Protein kinase activity associated with stored messenger ribonucleoprotein particles of Xenopus oocytes
  2. 982
    Publicado 1990
    “…Nuclear pore complexes (NPCs) prepared from Xenopus laevis oocyte nuclear envelopes were studied in "intact" form (i.e., unexposed to detergent) and after detergent treatment by a combination of conventional transmission electron microscopy (CTEM) and quantitative scanning transmission electron microscopy (STEM). …”
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    Correlation between structure and mass distribution of the nuclear pore complex and of distinct pore complex components
  3. 983
    Publicado 1996
    “…Here, we use both meiotic and mitotic extracts from Xenopus laevis eggs to study microtubule aster formation and microtubule dynamics in the presence of chromatin. …”
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    Influence of M-phase chromatin on the anisotropy of microtubule asters
  4. 984
    Publicado 1996
    “…In this study, we have examined the mechanism by which organelle transport is controlled by the cell cycle in extracts of Xenopus laevis eggs. Here, we show that photocleavage of the dynein heavy chain dramatically inhibits minus end-directed organelle transport and that purified dynein restores this motility, indicating that dynein is the predominant minus end-directed membrane motor in Xenopus egg extracts. …”
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    Cell cycle regulation of dynein association with membranes modulates microtubule-based organelle transport
  5. 985
    “…This protein disrupts the lamin organization of nuclei when microinjected into mammalian cells and also disrupts the lamin organization of in vitro assembled nuclei when added to Xenopus laevis interphase egg extracts. In both cases, the lamina appears to be completely absent, and instead the endogenous lamins and the mutant lamin protein are found in nucleoplasmic aggregates. …”
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    Disruption of Nuclear Lamin Organization Alters the Distribution of Replication Factors and Inhibits DNA Synthesis
  6. 986
    “…We have isolated two variants of Xenopus laevis ADAR1 for which no editing substrates are currently known. …”
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    The RNA-editing Enzyme ADAR1 Is Localized to the Nascent Ribonucleoprotein Matrix on Xenopus Lampbrush Chromosomes but Specifically Associates with an Atypical Loop
  7. 987
    “…As an N antagonist, Dll3 promoted Xenopus laevis neurogenesis and inhibited glial differentiation of mouse neural progenitors. …”
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    The divergent DSL ligand Dll3 does not activate Notch signaling but cell autonomously attenuates signaling induced by other DSL ligands
  8. 988
    “…However, injection of recombinant HsCen3p or of RNA encoding HsCen3p in one blastomere of two-cell stage Xenopus laevis embryos resulted in undercleavage and inhibition of centrosome duplication. …”
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    A Role for Centrin 3 in Centrosome Reproduction
  9. 989
    Publicado 1993
    “…In contrast, oocytes and early cleavage embryos of the amphibian Xenopus laevis are believed to contain a single lamin isoform, lamin LIII, which after nuclear envelope breakdown during meiotic maturation is reported to be completely soluble. …”
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    Membrane-associated lamins in Xenopus egg extracts: identification of two vesicle populations
  10. 990
    “…To find the MT stabilizer, we affinity purify nuclear localization signal (NLS)–containing proteins from Xenopus laevis egg extracts. This NLS protein fraction contains the MT stabilization activity. …”
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    Cdk11 is a RanGTP-dependent microtubule stabilization factor that regulates spindle assembly rate
  11. 991
    “…Immunoglobulin sequences from an individual Xenopus laevis froglet were analyzed for combinatorial and junctional diversity. …”
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    IgH Diversity In an Individual With Only One Million B Lymphocytes
  12. 992
    “…Enhancing presenilin levels in Xenopus laevis oocytes accelerates clearance of cytosolic Ca(2+), whereas higher levels of SERCA2b phenocopy PS1 overexpression, accelerating Ca(2+) clearance and exaggerating inositol 1,4,5-trisphosphate–mediated Ca(2+) liberation. …”
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    SERCA pump activity is physiologically regulated by presenilin and regulates amyloid β production
  13. 993
    “…To investigate the role of the major histocompatibilty complex (MHC) in conferring pathogen resistance, we challenged Xenopus laevis tadpoles bearing different combinations of four MHC haplotypes (f, g, j, and r) with the bacterial pathogen Aeromonas hydrophila in two experiments. …”
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    Major Histocompatibility Complex Based Resistance to a Common Bacterial Pathogen of Amphibians
  14. 994
    “…Using a method to identify proteins recruited to DSBs in Xenopus laevis egg extract, we show that DSB-containing DNAs accumulate members of the Skp1–Cul1–F-box complex and K48-linked polyubiquitylated proteins in addition to known repair proteins. …”
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    Ku80 removal from DNA through double strand break–induced ubiquitylation
  15. 995
    “…Moreover, we found that B23/nucleophosmin binds SENP3 and SENP5 in Xenopus laevis egg extracts and that it is essential for stable accumulation of SENP3 and SENP5 in mammalian tissue culture cells. …”
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    Nucleolar protein B23/nucleophosmin regulates the vertebrate SUMO pathway through SENP3 and SENP5 proteases
  16. 996
    “…Altered spindle microtubule dynamics at anaphase onset are the basis for chromosome segregation. In Xenopus laevis egg extracts, increasing free calcium levels and subsequently rising calcium-calmodulin–dependent kinase II (CaMKII) activity promote a release from meiosis II arrest and reentry into anaphase. …”
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    CaM kinase II initiates meiotic spindle depolymerization independently of APC/C activation
  17. 997
    “…We tested for a direct role in NPC biogenesis using Xenopus laevis in vitro assays and found that anti-Rtn4a antibodies specifically inhibited de novo nuclear pore formation. …”
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    ER membrane–bending proteins are necessary for de novo nuclear pore formation
  18. 998
    “…Electrophysiological measurements using Xenopus laevis oocytes showed that OsYSL18 transports iron(III)–deoxymugineic acid, but not iron(II)–nicotianamine, zinc(II)–deoxymugineic acid, or zinc(II)–nicotianamine. …”
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    OsYSL18 is a rice iron(III)–deoxymugineic acid transporter specifically expressed in reproductive organs and phloem of lamina joints
  19. 999
    “…We tagged full-length CPEB and an inactive mutant CPEB with fluorescent proteins, then imaged rapid dendritic branch dynamics and RNP distribution using two-photon time-lapse microscopy of neurons in the optic tectum of living Xenopus laevis tadpoles. Though the inactive CPEB mutant transports mRNA in the dendritic arbor, its expression interferes with CPEB-dependent translation because it is incapable of activity-triggered mRNA polyadenylation. …”
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    The Relationship between Dendritic Branch Dynamics and CPEB-Labeled RNP Granules Captured in Vivo
  20. 1000
    “…Here we report that mouse, Xenopus laevis and Drosophila melanogaster Piwi family proteins contain symmetrical dimethylarginines (sDMAs). …”
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    Arginine methylation of Piwi proteins, catalyzed by dPRMT5, is required for Ago3 and Aub stability
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