Complement C1s Subcomponent

**Semantic type:** Amino Acid, Peptide, or Protein|Enzyme

**Definition:** Complement C1s subcomponent (688 aa, ~77 kDa) is encoded by the human C1S gene. This protein plays a role in the proteolytic activation of complement components C2 and C4.

**Synonyms:** - C1 Esterase - C1S - Complement C1s - Complement Component 1 Subcomponent S - EC 3.4.21.42