Anti-PEAK1 antibodies are used in the immunodetection of the protein pseudopodium enriched atypical kinase 1. In humans, the canonical protein has a reported length of 1746 amino acid residues and a mass of 193.1 kDa. Its subcellular localization is in the cytoplasm. A member of a the Protein kinase protein superfamily, PEAK1 is a suspected catalytically inactive kinase. Post-translational modifications have been described, including phosphorylation. Synonyms for this target antigen include NKF3 kinase family member, sugen kinase 269, tyrosine-protein kinase SgK269, and inactive tyrosine-protein kinase PEAK1.