Cyclin E and cyclin A as candidates for the restriction point protein.

Abstract

Progression of cells into S phase is proposed to be determined by accumulation of a labile protein (the restriction point protein R; A. B. Pardee, Proc. Natl. Acad. Sci. USA, 71: 1286-1290, 1974). We report here that cyclin E and cyclin A proteins as well as their dependent histone H1 kinases satisfy all of the criteria for the R protein, which includes… (More)

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