3.4.21.42	activated complement C1s, C1 esterase, C1-esterase, C1g, C1s, C1s protease, C1s serine protease, complement 1s, complement C.hivin. 1s, complement C1s, complement C1s, activated, complement component 1 s, complement component 1 subcomponent s, complement component C1s, complement protease, complement protease C1s, complement subcomponent 1s, complement subcomponent C1sbar, esterase, C1, mannan-binding lectin-associated serine protease-2, MASP-2, MBL-associated serine protease-2, multiprotein complex C1, protease C1s, serine protease C1s