The cell cycle orchestrates the division and replication of cells through a series of tightly controlled phases: G1, S, G2, and M phase. Within each phase, numerous proteins collaborate to coordinate this process. Among them, cyclins, a family of proteins, hold a central regulatory role. Working alongside cyclin-dependent kinases (CDKs) and CDK inhibitors, cyclins govern the cell cycle's progression. Specific cyclins peak at distinct cell cycle points. Dysregulation in these mechanisms can lead to uncontrolled cell proliferation, contributing to cancer development and progression.