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. 1989 Dec 20;8(13):3985–3995. doi: 10.1002/j.1460-2075.1989.tb08581.x

p34cdc2 is located in both nucleus and cytoplasm; part is centrosomally associated at G2/M and enters vesicles at anaphase.

E Bailly 1, M Dorée 1, P Nurse 1, M Bornens 1
PMCID: PMC401573  PMID: 2686978

Abstract

The cdc2+ gene product p34cdc2 is located immunocytochemically in both the nucleus and cytoplasm of human cells. It is uniformly distributed throughout the cytoplasm and is irregularly distributed in the nucleus. Part of p34cdc2 is associated with the centrosome and centrosomal staining increases late in the cell cycle and at the onset of mitosis. This distribution is corroborated by cell fractionation which also indicates that slower migrating forms of p34cdc2 are found in isolated centrosomes and in Triton-insoluble fractions. We propose that one role of the p34cdc2 protein kinase is to modify the centrosome bringing about formation of the mitotic spindle. At anaphase p34cdc2 becomes associated with vesicles in the middle of the cell between the reforming nuclei. A similar location is found for p13suc1 and we suggest that the vesicular localization plays a role in p34cdc2 kinase inactivation at the end of mitosis.

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