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Stage VI Xenopus oocytes are suspended at the G2/M transition of meiosis I, and represent an excellent system for the identification and examination of cell cycle regulatory proteins. Essential cell cycle regulators such as MAPK, cyclins and mos have the ability to induce oocyte maturation, causing the resumption of the cell cycle from its arrested state.(More)
Terminal differentiation and cell proliferation are in many cases, as in muscle cells, mutually exclusive processes. While differentiating myoblasts are withdrawn from the cell cycle, myogenesis is inhibited by some mitogens and overexpression of some oncogenes, including proto-oncogene c-fos (which expresses a growth-associated protein constituting the(More)
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