title: Serological characterization of acidic (pI 5.5) and neutral (pI 7.1) forms of 17kD and 35kD interleukin-1.
abstract: Human interleukin-1 (IL-1) was partially purified into the acidic and neutral 17,000 dalton forms and the acidic and neutral 35,000 dalton forms. Heterologous antiserum raised against purified human IL-1 (neutral, 17,000 daltons) neutralized only the neutral 35,000 dalton and 17,000 dalton isoelectric forms. Conversely, an antiserum raised against purified porcine acidic IL-1 (21,000 daltons) neutralized only the acidic 35,000 and 17,000 dalton forms. These results confirm earlier findings that the acidic and neutral species of IL-1 are not derived from the same gene. In addition, the results suggest that each isoelectric form of the 17,000 dalton IL-1 is probably derived directly from the corresponding 35,000 dalton IL-1.
mesh_terms: D000936:Antigen-Antibody Complex; D003429:Cross Reactions; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007106:Immune Sera; D007375:Interleukin-1 / Q000235:genetics / Q000276:immunology / Q000302:isolation & purification*; D007525:Isoelectric Focusing; D007700:Kinetics; D008213:Lymphocyte Activation; D008970:Molecular Weight
chemical_list: D000936:Antigen-Antibody Complex; D007106:Immune Sera; D007375:Interleukin-1