title: Soluble inhibitory factor (SIF) in normal human serum.
mesh_terms: D002852:Chromatography, Ion Exchange; D002855:Chromatography, Thin Layer; D006017:Glycolipids / Q000302:isolation & purification / Q000494:pharmacology; D006801:Humans; D007959:Lymphocyte Culture Test, Mixed; D008222:Lymphokines / Q000097:blood* / Q000302:isolation & purification / Q000494:pharmacology; D008968:Molecular Conformation; D013491:Suppressor Factors, Immunologic; D013936:Thymidine / Q000378:metabolism
chemical_list: D006017:Glycolipids; D008222:Lymphokines; D013491:Suppressor Factors, Immunologic; D013936:Thymidine