3.4.21.41	activated complement C1r, C1r, C1r protease, C1r serine protease, C1r-LP, C1rbar-esterase, complement C1r subcomponent-like protein, complement C1r, activated, complement protease C1r, complement subcomponent 1r, proteases C1r, serine protease C1r, Xld, xolloid	-	
3.4.21.41	CUB	complement C1r/C1s-sea urchin epidermal growth factor-BMP1	
3.4.21.41	C1r	factor XII fragment can activate C1r subcomponent of C1	
3.4.21.41	multiprotein complex C1	the multiprotein complex C1 is formed from the recognition subcomponent C1q and a tetramer of proteases C1r2C1s2