title: Semi-flexible joint in the C1q subunit of the first component of human complement.
mesh_terms: D003166:Complement Activating Enzymes; D015922:Complement C1q; D006801:Humans; D008854:Microscopy, Electron; D008958:Models, Molecular
chemical_list: D015922:Complement C1q; D003166:Complement Activating Enzymes