Citrullination

Citrullination is when some of the parts of a protein called amino acids change into a different amino acid called citrulline. This can happen in our bodies when special enzymes take away a little piece of the protein called an arginine. This can make the protein look different and act differently than before. Citrullination is important for many things in our bodies like fighting off germs and keeping our joints healthy. It is also studied by scientists to learn more about different diseases like arthritis and multiple sclerosis.