Kinase activity refers to the enzymatic activity of kinases, which are a type of protein that plays a crucial role in cell signaling and regulation of various cellular processes. Kinases function by transferring phosphate groups from ATP molecules to specific target proteins, thereby modifying their structure and function. This process, known as phosphorylation, regulates a wide range of cellular activities, such as cell growth, proliferation, differentiation, and apoptosis. Abnormal kinase activity has been associated with various diseases, including cancer, inflammatory disorders, and metabolic diseases. Therefore, studying and manipulating kinase activity is a major focus of research in the field of molecular biology and drug development. Researchers study kinase activity to better understand cell signaling pathways, identify potential drug targets, and develop new therapies for diseases associated with dysregulated kinase activity.