CDK6 is a protein that plays a crucial role in regulating the cell cycle, which is the process that cells go through to grow and divide. It is part of a group of proteins known as cyclin-dependent kinases (CDKs) that help control the progression of cells from one phase of the cell cycle to another. Specifically, CDK6 is involved in the transition from the G1 phase to the S phase, where DNA is replicated. Abnormal activity of CDK6 has been linked to various types of cancer, as it can lead to uncontrolled cell division. Researchers are studying CDK6 as a potential target for cancer therapies, aiming to develop drugs that can inhibit its function and slow down tumor growth. Understanding CDK6 is essential for advancing cancer treatment strategies.