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Surface polarization in loach eggs and two cell embryos: correlations between surface relief, endocytosis and cortex contractility

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Figure

Fig. 12. Schematicrepresentationof experimentson suctionof yolkgranulesout of eggs.112a! The egg with formed blastodisc40-45mlnafter inseminationYolky part of the egg ISmarked with dots!12b) The eggwas puncturedIn the animal pole area, and suction of yolk granules wasstarred.112c}The egg after suction was completed.and micropiprettewaswithdrawn(12dl The egg rapidly regains a pear-shapedform.
Fig. 13. Contractileresponsesof the egg to the decreasein surfacetensioncausedby suctionof yolk granules.(13al Low magnificationYlelvofthe egg fl\ed10 mm after suctionThe egg crac~ed when It was placed In an electron microscopeA, arJ/malpole: V
Fig. 14. Development(14b), and 10 mm after suction
Fig. 15. Movementof the egg surfaceArrowheadsduringooplasmicsegregationand the 1st cleavagedivision(side views).The egg was photographed20mm (15al.50 mm (15bl
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