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 - -, 650989, 683195, 683889, 696932, 697529, 698805, 700245, 717587, 717603, 717786, 717805, 718116, 732102, 732820, 732824, 732889, 752432, 753085, 753377, 753598 3.4.21.41 CUB complement C1r/C1s-sea urchin epidermal growth factor-BMP1 698805 3.4.21.41 C1r factor XII fragment can activate C1r subcomponent of C1 718117 3.4.21.41 multiprotein complex C1 the multiprotein complex C1 is formed from the recognition subcomponent C1q and a tetramer of proteases C1r2C1s2 755267