TY - RPRT TI - Conformational and functional changes in the fourth component of human complement produced by nucleophilic modification and by proteolysis with C1s-. AU - D E Isenman AU - D I Kells PY - 1982 DO - 10.1021/bi00535a001 UR - https://pubmed.ncbi.nlm.nih.gov/6978735/ ID - 6978735 ER -