Fig. 1. (a) An important role is rendered by the anti-apoptotic protein Bcl-2 in the intrinsic apoptotic pathway of cells that involves Cytochrome (C) and two cytosol proteins
Apaf-1 (Apoptotic protease activating factor-1) and Pro-Caspase-9 which are essential for the formation of the apoptosome activating Caspase-9. In presence of effector
Caspases-3, 6, and 7, Caspase-9 sends the apoptotic Caspase cascade leading to cell death. Inhibition of Bcl-2 inhibits the apoptosome formation that further prevents the cell
death pathway. (b) The role played by Cyclins in the Cell cycle when Cdk (Cyclin dependent kinases) are activated due to Cdk–Cyclin interaction and phosphorylation. In
presence of growth stimulus, adult cells residing in Go phase enters the G1 phase in presence of Cdk4/6 + Cyclin D (upregulated c-Myc). It also stimulates Cyclin E synthesis
which in presence of Cdk2 helps the entry of the cells from G1 to S phase. Further Cdk2 binds to Cyclin A for metaphase of mitosis stage that is promoted by Cdk1 + Cyclin B. *
indicates target of interest for this study.