C1s B chain is a serine protease that combines with C1q and C1r to form C1, the first component of the classical pathway of the complement system. C1r activates C1s so that it can, in turn, activate C2 and C4.

Associated with:

Matrix Type

  • Plasma
  • Tissue/Cells

Gene Symbol

  • C1S

UniProt ID

  • P09871

Request the C1S Assay

Tell us a little more about your study so we can optimize the assay for your specific needs.

"*" indicates required fields

This field is for validation purposes and should be left unchanged.