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- W2062832904 abstract "The phenomena described by Albertsson (1960) as occurring in phase systems are regarded as useful models for the understanding of biological structure. A survey is given of results in respect to phase separation and partition which are observed in fertilized sea urchin eggs after pretreatment with low doses of trypsin. Upon insemination of sea urchin oocytes, the spermatozoa induce the formation of protrusions (reception cones). These consist of ground cytoplasm and form a phase I strictly separated from a more proximal phase II, rich in dispersed endoplasmic vesicles. The rest of the cytoplasm is rich in granular components and may be regarded as a phase III. This view is substantiated by observations on the remixing of components that occurs during the withdrawal of the protrusion. This is a process which is driven by the tendency to remix and by active movements occurring in the protrusions. The suggestion is made that the ground cytoplasm consists of several phases that under normal conditions are miscible to varying extents according to the conditions prevailing. The formation of protrusions with ensuing reversible phase separation is regarded as due to a basic protective mechanism operating in the cytoplasm." @default.
- W2062832904 created "2016-06-24" @default.
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- W2062832904 date "1963-01-01" @default.
- W2062832904 modified "2023-09-26" @default.
- W2062832904 title "Sperm-induced protrusions in sea urchin oocytes: A study of phase separation and mixing in living cytoplasm" @default.
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- W2062832904 doi "https://doi.org/10.1016/0012-1606(63)90105-2" @default.
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