mucin proteins

Mucin proteins are specialized molecules produced mainly by the cells lining your body's internal and external surfaces, such as your mouth, nose, and digestive tract. They are a key component of mucus, the slippery, gel-like substance that traps dirt, bacteria, and other particles, protecting and lubricating tissues. Mucins are large, complex proteins with many sugar molecules attached, giving mucus its viscosity and ability to form a protective barrier. This helps keep tissues moist, defend against infections, and facilitate the movement of food or other materials through your body.