Crystal structure of the catalytic domain of human complement c1s: a serine protease with a handle.
Gaboriaud, C., Rossi, V., Bally, I., Arlaud, G.J., Fontecilla-Camps, J.C.(2000) EMBO J. 19: 1755-1765
- PubMed: 10775260 
- DOI: 10.1093/emboj/19.8.1755
- PubMed Abstract: 
C1s is the highly specific modular serine protease that mediates the proteolytic activity of the C1 complex and thereby triggers activation of the complement cascade. The crystal structure of a catalytic fragment from human C1s comprising the second ...