Biotinylated Human IL-12BIL-12A Heterodimer Protein, His,Avitag™Flag Tag IL2-H8210 is expressed from human 293 cells HEK293. It cont ains AA Ile 23 - Ser 328 IL-12B Arg 23 - Ser 219 IL-12A Accession P29460-1 IL12B P29459-1 IL12A. 1 * 200 µG