Mucin

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Mucin

Mucin (/ˈmjuːsɪn/) is a type of protein produced by the epithelial tissues and is a major component of mucus, which helps to protect and moisturize the body's surfaces.

Etymology

The term "mucin" is derived from the Latin word "mucus", which means "slime" or "snot". It was first used in the mid-19th century to describe the main component of mucus.

Function

Mucin plays a crucial role in the body's defense system. It forms a protective barrier on the epithelial surfaces, preventing pathogens from reaching the cells. Mucin also helps to keep these surfaces moist, preventing them from drying out and becoming damaged.

Types

There are two main types of mucin: secreted mucins and membrane-bound mucins. Secreted mucins, such as MUC5AC and MUC5B, are found in the mucus that covers the surfaces of the respiratory, digestive, and reproductive tracts. Membrane-bound mucins, such as MUC1, are found on the surfaces of these cells and help to protect them from pathogens.

Related Terms

  • Mucus: A slimy substance produced by the mucous membranes that protects and moisturizes the body's surfaces.
  • Epithelial Tissues: The tissues that line the surfaces of the body, including the skin, blood vessels, and organs.
  • Pathogens: Harmful organisms, such as bacteria and viruses, that can cause disease.

External links

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