TY - RPRT TI - Purification of human complement subcomponent C4. C4 cleavage by C1s. AU - A Reboul AU - N Thielens AU - M B Villiers AU - M G Colomb PY - 1979 DO - 10.1016/0014-5793(79)81271-5 UR - https://pubmed.ncbi.nlm.nih.gov/467643/ ID - 467643 ER -