Alpha-casein is a type of protein found in milk, making up about 30% of the total protein content in cow's milk. It plays a crucial role in the formation of curds during cheese production, contributing to the texture and flavor of various cheeses. This protein is also important for human nutrition, as it provides essential amino acids necessary for growth and development. Alpha-casein is often studied for its potential health benefits, including its role in muscle repair and immune function.