opsonin binding | cation binding | complement binding | hydrolase activity | complement component C4b binding | catalytic activity | serine hydrolase activity | calcium-dependent protein binding | ion binding | protein binding | serine-type endopeptidase activity | serine-type peptidase activity | calcium ion binding | endopeptidase activity | metal ion binding | peptidase activity
proteolysis | nitrogen compound metabolic process | protein metabolic process | metabolic process | organic substance metabolic process | serine-type endopeptidase activity | serine-type peptidase activity | endopeptidase activity | peptidase activity | macromolecule metabolic process