Starfish germinal vesicle
WebbBiochemical and Cellular Effects of Roscovitine, a Potent and Selective Inhibitor of the Cyclin-Dependent Kinases cdc2, cdk2 and cdk5 WebbWe have investigated the possibility that mitotic nuclei originating from preimplantation stage embryos and placed in the oocyte cytoplasm can undergo remodelling that allows them to undergo meiosis in the mouse. To address this question, we have
Starfish germinal vesicle
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WebbImmature starfish oocytes, which are arrested at the first meiotic prophase and contain a large nucleus called the germinal vesicle (GV), are known to accept multiple sperm on … WebbStarfish egg. Light micrscope image of a starfish egg (germinal vesicle stage). Development series: 2 of 23. Credit Science Source / Science Source. Dimensions 3929 x 2542 pixels. Print Size @ 300 dpi 13 x 8 inches / 33 x …
WebbWhen polyspermic starfish oocytes inseminated at the GV stage are induced to mature, they apparently accomplish meiosis I normally, because breakdown of the germinal vesicle and the first polar body (PB1) emission occurred with a timing similar to unfertilized oocytes (see Fig. 4). WebbDescription. A set of 25 slides designed for vertebrate embryology with special emphasis on the chick. Pig slides are included for comparative study, while starfish slides offer a clear general picture of early holoblastic equal cleavage. Frog development slides show holoblastic unequal cleavage, formation of the blastula, gastrula, yolk plug ...
Webb1 feb. 2000 · The germinal vesicle (GV) of starfish oocytes stays just beneath the oocyte cortex at the presumptive animal pole during the long period of oogenesis. We subjected … Webb1 jan. 2014 · In starfish, the period between germinal vesicle breakdown (GVBD) and the extrusion of the first polar body (2n) represents the optimal period for successful …
Webb19 juni 2024 · The mechanism of serotonin (5-HT)-induced oocyte germinal vesicle breakdown (GVBD) in the mud crab, Scylla paramamosain, was investigated in this study. Histological staining showed that there were two meiotic arrests in oocyte, appearing at prophase I and metaphase I. This result indicated that meiosis I arrest at prophase I in S. …
WebbStarfish oocytes with intact germinal vesicles (GVs) were cut along desired planes with glass needles or ligated using silk thread loops into two parts and Cytoplasmic … bootstrap wrapper classWebbIt was discovered about 30 years ago that a dramatic increase in intracellular calcium ion concentration ([Ca 2+] i) occurs at fertilization and that this increase acts as the pivotal signal for egg activation.Later, the Ca 2+ signal at fertilization turned out to be ubiquitous among animal species. Extensive advance has been brought during these 30 years in … bootstrap wrap textWebb1. Resting and activated eggs of the sea urchin Arbacia punctulata were swollen in hypotonic sea water (60, 70, 80, and 90 per cent), and allowed to attain equilibrium volumes (Figs. 1 and 2). 2. Both fertilized and unfertilized eggs obey the Boyle-van't-Hoff law, but the value for b , the "osmotically inactive fraction" or non-swellable volume, was different for … bootstrap woocommerce themeWebb22 feb. 1994 · By using conventional intracellular microelectrodes, we show that the starfish germinal vesicle in situ has a resting potential of +4 mV to +30 mV with respect … hattie ophelia carawayWebb15 jan. 1981 · The participation of germinal vesicle material in the production of MPF was investigated with oocytes of the starfish, Asterina pectinifera. When enucleated oocytes … hat tien hon chaWebb1 jan. 1979 · Nicotinamide inhibited both germinal vesicle breakdown (GVBD) and polar body formation (PBF) in surf clam and starfish oocytes. In the surf clam nicotinamide at 0.3 mM completely blocked PBF in the fertilized oocytes. For blockage of GVBD higher concentration was required. In the starfish, nicotinamide (30 mM) prevented PBF but not … bootstrap wp themeWebbTyson1991 - Cell Cycle 6 var Mathematical model of the interactions of cdc2 and cyclin. This model is described in the article: Modeling the cell division cycle: cdc2 and cyclin interactions. Tyson JJ. Proc. Natl. Acad. Sci. U.S.A. 1991; 88(16); 7328-32 Abstract: The proteins cdc2 and cyclin form a heterodimer (maturation promoting factor) that controls … bootstrap wrap class