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Fig. 4 | BMC Biology

Fig. 4

From: Pursuing the impossible: an interview with Tim Hunt

Fig. 4

Frog oocytes before and after maturation. Oocytes (left-hand side) are surgically removed from the belly of a female frog and incubated in the presence of progesterone, which induces maturation. The white spot (right-hand side) that forms after a few hours marks the position of the second meiotic spindle, indicating completion of the cell-cycle transitions that occur at maturation

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