title: Structural changes in C4 produced by cleavage with C1-s.
mesh_terms: D001667:Binding, Competitive; D002118:Calcium; D002942:Circular Dichroism; D003166:Complement Activating Enzymes; D003173:Complement C1s; D003181:Complement C4; D004792:Enzyme Precursors; D007700:Kinetics; D011485:Protein Binding; D011487:Protein Conformation; D013056:Spectrophotometry, Ultraviolet; D013439:Sulfhydryl Reagents
chemical_list: D003181:Complement C4; D004792:Enzyme Precursors; D013439:Sulfhydryl Reagents; D003166:Complement Activating Enzymes; D003173:Complement C1s; D002118:Calcium