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This gene encodes the acidic form of complement factor 4, part of the classical activation pathway. The protein is expressed as a single chain precursor which is proteolytically cleaved into a trimer of alpha, beta, and gamma chains prior to secretion. The trimer provides a surface for interaction between the antigen-antibody complex and other complement components. The alpha chain may be cleaved to release C4 anaphylatoxin, a mediator of local inflammation. Deficiency of this protein is associated with systemic lupus erythematosus and type I diabetes mellitus. This gene localizes to the major histocompatibility complex (MHC) class III region on chromosome 6. Varying haplotypes of this gene cluster exist, such that individuals may have 1, 2, or 3 copies of this gene.
仅用于科研。不用于诊断过程。未经明确授权不得转售。
蛋白别名: acidic C4; Acidic complement C4; Basic complement C4; C3 and PZP-like alpha-2-macroglobulin domain-containing protein 2; C3 and PZP-like alpha-2-macroglobulin domain-containing protein 3; c4 complement; C4A anaphylatoxin; Chido form of C4; Complement C4-A; Complement C4-B; complement C4B1a; DADB-112B14.11; DAMC-258G8.6; FLJ60561; MGC164979; MHC class III region complement; Rodgers form of C4
基因别名: C4; C4A; C4A2; C4A3; C4A4; C4A6; C4AD; C4B; C4B1; C4B12; C4B2; C4B3; C4B5; C4B_2; C4BD; C4F; C4S; CH; CO4; CPAMD2; CPAMD3; RG
UniProt ID: (Human) P0C0L4, (Human) Q4LE82, (Human) P0C0L5
Entrez Gene ID: (Human) 720, (Human) 721, (Human) 100293534