Human IL-21 R & IL-2 R gamma Heterodimer Protein, Fc Tag&Fc Tag (ILA-H52W9) is expressed from human 293 cells (HEK293). It contains AA Cys 20 - Pro 236 (IL-21 R) & Leu 23 - Asn 254 (IL-2 R gamma) (Accession # Q9HBE5-1 (IL-21 R) & P31785-1 (IL-2 R gamma)).