The SERPINA1 gene provides instructions for making a protein called alpha-1 antitrypsin, which is a type of serine protease inhibitor (serpin). Learn about this gene and related health conditions.

Oct 18, 2022 · Differences (mutations) in a specific gene cause Alpha-1 antitrypsin deficiency. The SERPINA1 gene makes a protein called Alpha-1 antitrypsin (AAT) that protects your lungs from …