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Changes in embryonic 8 cell nuclei transferred by means of cell fusion to mouse eggs

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Fig.4. Prematurechromosomecondensation(PCCIof blastomerenucleiin metaphaseII oocytes.One hour after fusion118nucleustrans-forms mto differentiallycondensed(pulverized)chromosomesdistributedover the mducedspmdle.(A,B) two heterokaryons showing pce spindle(l
Fig. 6. Thedevelopmenttion.of interphasenucleiin heterokaryonsformedbetweenmetaphaseIIoocytesandblastomeres,submittedto activa-Egg pronucleus:clearcircle;blastomerenucleus:stripedcircle.Nucleolishownas blackdots.Followingoocyteactivationkaryokineticdivisio
Fig. 7. Formationof interphasenucleiin oocyte.blastomerehybridssubmittedto activation(4 h cultureafter activation).After induced PCe.pronucleartypeinterphasenuclei are reconstructed(long arrowhead)besidethe egg pronucleus(small arrowhead).(AI Formationof o
Fig.15.ducedpOS/tlon Morphologyofblastomerenuclei(longarrowhead)intro.intoactivatedoocytes.(A) 118 nucleustransferredto oocyte40min afteractivationIS slightlychanged,butretainsinterphasecharacter,whereasoocytechromatincompletesthesecondmeioticdivision(1 hc

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