In the new study, the researchers focused on one of the genes in this region, called complement component 4, or C4, which is known to be involved in the immune system. (scientificamerican.com)
To see if the effect also works in reverse, the team asked whether mice grown in a germ - free environment would express genes encoding complement components differently than mice grown under normal conditions. (sciencedaily.com)
Complement 3 deficiency is a disorder of the immune system affecting the Brittany that is characterized by a lack of the protein complement component 3. (pawprintgenetics.com)