kinase cascade

A kinase cascade is a series of molecular events where one enzyme, called a kinase, activates another by adding a phosphate group. This chain reaction amplifies the initial signal within a cell, allowing a small external cue—like a hormone or stress—to trigger a large response. Each kinase in the sequence activates the next, leading to specific changes inside the cell, such as gene expression, growth, or survival. This process provides precise control over cellular activities and is essential for normal function and response to environmental signals.