After DNA damage (e.g. caused by X-ray exposure) in eukaryotic cells, the cell cycle can be arrested by the stabilisation of the - gene, whose protein product interacts with the G1/S-Cdk and S-Cdk complexes. protein which drives the transcription of the - O PDGF, acetyltransferase O phenylalanine hydraxylase, PDGF O p53, acetyltransferase O p53, p21 O p21. p53

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Cell Signaling

It allows cells to perform various cellular activities, coordinate, and interact with other cells. All cells of an organism receive signals from their environments and respond accordingly. Even the unicellular eukaryotes receive signals secreted by other cells and respond. In the case of yeast, mating takes place by signaling between the yeast cells. Communication by cell signaling in a multicellular organism has become a vast and important part of various fields of biology.