Tags: Protein.
In molecular biology the C1q domain is a conserved protein domain. C1q is a subunit of the C1 enzyme complex that activates the serum complement system. C1q comprises 6 A 6 B and 6 C chains. These share the same topology each possessing a small globular N-terminal domain a collagen-like Gly/Pro-rich central region and a conserved C-terminal region the C1q domain. The C1q protein is produced in collagen-producing cells and shows sequence and structural similarity to collagens VIII and X.
