| 词汇 | example_english_sea-urchin |
| 释义 | Examples of sea urchinThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Proteolysis of the major yolk glycoproteins is regulated by acidification of the yolk platelets in seaurchin embryos. In animal systems, studies on the activation of seaurchin and clam eggs have also found changes in enzyme activity and location. Localisation of fluorescently labelled calmodulin in living seaurchin eggs during early development. Changing localizations of site-specific surface antiperhaps sequential patterns of gene expression during gens during seaurchin spermiogenesis. The seaurchin egg is a model for such studies. A localized zone of increased conductance progresses over the surface of the seaurchin egg during fertilization. For example, in seaurchin oocytes, calciuminduced cortical granule exocytosis leads to the formation of a zygote with a mosaic plasma membrane. Characteristics of individual repetitive sequence families in the seaurchin genome studied with cloned repeats. Localization and possible role of molecules acetylcholinesterase in seaurchin embryos. Good candidates may be the yolk platelets, acidic vesicles and pigment granules, all of which are present in seaurchin eggs. Ligand-dependent stimulation of introduced mammalian brain receptors alters spicule symmetry and other morphogenetic events in seaurchin embryos. Experimental separation of pronuclei in fertilised seaurchin eggs: chromosomes do not organise a spindle in the absence of centrosomes. Redundant mechanisms of calcium-induced calcium release underlying calcium waves during fertilization of seaurchin eggs. Microinjection of inositol triphosphate activates seaurchin eggs. Microtubules are required for completion of cytokinesis in seaurchin eggs. This may be the reason why a single seaurchin spermatozoon could not activate a mouse oocyte. The hyaline layer is a collagen-containing extracellular matrix in seaurchin embryos and reaggregating cells. Local perinuclear calcium signals associated with mitosis entry in early seaurchin embryos. Activation of amino acid uptake at fertilization in the seaurchin egg. A variety of methods has been developed to prevent formation of fertilisation membranes in seaurchin eggs. In the present study about 20% of mouse oocytes were activated following injection of 10 seaurchin spermatozoa. The response of mouse oocytes injected with seaurchin spermatozoa. The microassay can be used to study the effects of many other molecular probes on the development of the seaurchin embryo. The results provide evidence that septate junctions mediate the barrier to paracellular permeability in seaurchin embryos. Immunolocalization of hyalin in seaurchin egg and embryo using an antihyalinspecific monoclonal antibody. Three cell recognition changes accompany the ingression of seaurchin primary mesenchyme cells. Here, a microplate assay has been developed for quantitatively evaluating the effects of substances, such as hyalin, on living seaurchin embryos. The isolation of intact cortical granules from seaurchin eggs: calcium ions trigger granular discharge. The ultrastructure of the seaurchin egg cortex isolated before and after fertilization. The seaurchin has served as a model system for the study of fertilisation and egg activation. Accumulation of fluorescently labeled actin in the cortical layer in seaurchin egg after fertilization. The purpose of this perspective is to summarise very concisely the current status of understanding of this binding process in one organism, the seaurchin. Cytoskeletal elements link calcium channel activity and the cell cycle in early seaurchin embryos. Intracellular free calcium rise triggers nuclear envelope breakdown in the seaurchin embryo. Among them, a2 and a5 were also present on in vitro preparations of seaurchin egg cortices. N-ethylmaleimidesensitive protein(s) involved in cortical exocytosis in the seaurchin egg: localization to both cortical vesicles and plasma membrane. A localized zone of increased conductance progresses over the surface of seaurchin egg during fertilization. To determine the function of septate junctions in seaurchin embryos, the permeability characteristics of the embryonic sea urchin epithelia were assessed. Sorting out of seaurchin embryonic cells according to cell types. Serotonergic-induced ion currents in cleaving seaurchin embryo. Insights into the molecular mechanisms involved in seaurchin fertilization envelope assembly. Experimental manipulation of the amount of tubulin available for assembly into the spindle of dividing seaurchin eggs. Isolation and biological activity of the proteins released by seaurchin eggs following fertilization. An enzymatic comparison of seaurchin eggs ghosts prepared before and after fertilization. Spatial characteristics of calcium transients associated with mitosis entry in early seaurchin embryos. Ultrastructure of human secretion: cortical granule exocytosis in seaurchin eggs as leucocytes after simultaneous fixation with glutaraldestudied by quick-freezing and freeze-fracture. Why did seaurchin spermatozoa activate foreign (mouse) oocytes, but not the eggs of the same species? We have analysed changes in translation during the early development of seaurchin using a cell-free system. The seaurchin genome: where will it lead us? Developmental appearance of factors that bind specifically to cis-regulatory sequences of a gene expressed in the seaurchin embryo. Tight junctions regulate the barrier to paracellular permeability in chordate epithelia; however, the seaurchin blastula epithelium lacks tight junctions and instead possesses septate junctions. We also detected a2 and a5 in seaurchin eggs, suggesting that integrins may be a common mediator in adhesion-fusion mechanisms triggered by fertilisation. This seaurchin decimates kelp beds and creates barrens, thus completely altering coastal ecosystems. The egg originated and local distribution of the surface of seaurchin embryo cells detected by immuno-fluorescence. Scanning electron microscope studies of the surface of seaurchin eggs. A molecular analysis of hyalin, a substrate for cell adhesion in the hyaline layer of the seaurchin embryo. A putative role for carbohydrates in seaurchin gastrulation. Hardening of the seaurchin fertilization envelope by peroxide-catalyzed phenolic coupling of tyrosines. The vitelline layer of the seaurchin egg and its modification during fertilization. A rapid change in phosphorylation of tyrosine accompanies fertilization of seaurchin eggs. Fine structure analysis of the cortical reaction in the seaurchin egg: after normal fertilization and after electrical induction. The role of the phosphatidyllope breakdown, chromosome condensation and spindle inositol cycle in mitosis in seaurchin zygotes. The time sequence of early events in the fertilisation of seaurchin eggs. Egg surface polymerization in the seaurchin egg. Sources of calcium in egg activation: a secretion: cortical granule exocytosis in seaurchin eggs as review and hypothesis. Isolation and characterization of plasma membrane-associated cortical granules from seaurchin eggs. Microinjection of the live spermatozoa into seaurchin eggs. Structural changes of the reticulum of seaurchin eggs during fertilization. Acidic vesicles and the uptake of amines by seaurchin eggs. A rapid change in phosphorylation on tyrosine accompanies fertilization of seaurchin eggs. Study on the effect of antisera on unfertilized seaurchin eggs. Activation of protein synthesis in a seaurchin cell-free system. Temporal sequence and spatial distribution of early events at fertilisation in single seaurchin eggs. Temporal sequence and spatial distribution of early events of fertilization in single seaurchin eggs. On the influence of antitransmitter substances on cellular interactions in early seaurchin embryos. Effect of 6-dimethylaminopurine on microtubules and putative intermediate filaments in seaurchin embryos. Activation of maternal centrosomes in unfertilized seaurchin eggs. The effect of local anesthetics and ammonia on cortical granule-plasma membrane attachment in the seaurchin egg. Formation of the cortical concavity at fertilization in the seaurchin egg. Studies on seaurchin and ascidian oocytes have helped to elucidate the molecular basis for these electrical phenomena and contributed to our knowledge on the mechanism of oocyte activation. Maturation and fertilization of the seaurchin oocytes: an electrophysiological study. Actin-like filaments in the acrosomal apparatus of spermatozoa of seaurchin. Progress in our laboratory was contained within the same boundaries until we discovered the sea urchin egg activation research and some early 20th-century seed papers buried in the literature. Subcellular localisation of seaurchin egg spectrin: evidence for the assembly of the membrane-skeleton on unique classes of vesicules in eggs and embryos. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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