U5The cell-cycle control system uses various mechanisms to p…
U5The cell-cycle control system uses various mechanisms to pause the cycle at specific transition points. When mitogens bind to cell-surface receptors, they trigger intracellular signaling pathways that can lead to progression through the cell cycle. One key target is the Retinoblastoma protein (Rb). How does the phosphorylation of Retinoblastoma protein (Rb) contribute to cell cycle progression?