Human IL-23A & Rat IL-12B Heterodimer Protein, His Tag&Tag Free (ILB-HR52W3) is expressed from human 293 cells (HEK293). It contains AA Arg 20 - Pro 189 (IL23A) & Met 23 - Ser 335 (IL12B) (Accession # Q9NPF7-1 (IL23A) & Q9R278-1 (IL12B)). 1 * 50 µG