Biochem Cell Biol 1987 Mar 01;653:219-29. doi: 10.1139/o87-028.

Patterns of protein synthesis during the cell cycle of Chinese hamster ovary cells.

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The protein synthesis patterns at various stages of the cell cycle of Chinese hamster ovary cells were examined by labelling cells with [35S]methionine and then separating the proteins by isoelectric focussing and two-dimensional, nonequilibrium pH gradient gel electrophoresis. We have observed a number of proteins which display quantitative differences in synthesis at specific cell cycle stages and of these the alpha- and beta-tubulins have been identified. A few proteins appear to be uniquely synthesized at specific times during the cell cycle. These include the histones and a modified version of them, which are synthesized only in S phase, and a pair of 21 kilodalton (kDa), pI 5.5 proteins, which appear only in late G2 and mitosis. We have also identified a 58-kDa, pI 7.5 protein which is present at all cell cycle stages except during late G2. This protein appears to have the same temporal properties as a 57-kDa protein called "cyclin" originally described in sea urchin embryos.

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Genes referenced: LOC100887844 LOC115919910