Listed are ELISA Kits for the detection of Ier4, an alias name of egl-9 family hypoxia inducible factor 2. The human protein, encoded by the gene EGLN2, is 407 amino acid residues long and has a mass of 43,650 daltons. However, there are up to 2 reported isoforms. It is an enzyme of the hypoxia-inducible factor-proline dioxygenase class. This protein is reported to have a nuclear cellular localization. This target may also be known as: egl nine homolog 2, HIF-prolyl hydroxylase 1, estrogen-induced tag 6, hypoxia-inducible factor prolyl hydroxylase 1, EIT-6, EIT6, and HIF-PH1.