Ready-to-use ELISA kits are available for the detection of Eukaryotic Translation Initiation Factor 2-alpha kinase 3, an alias of the protein, eukaryotic translation initiation factor 2 alpha kinase 3. The official gene symbol is EIF2AK3. The protein has a mass of 125.2 kDa and length of 1116 residues. It is a member of the Protein kinase superfamily, Ser/Thr protein kinase family, GCN2 subfamily and may be known by other names, including: PERK, PEK, pancreatic EIF2-alpha kinase, and PRKR-like endoplasmic reticulum kinase.