Anti-EEA1 antibodies are used in the immunodetection of the protein early endosome antigen 1. In humans, the canonical protein has a reported length of 1411 amino acid residues and a mass of 162.5 kDa. Its subcellular localization is in the membrane and cytoplasm. It is notably widely expressed in many tissue types. EEA1 is known to bind phospholipid vesicles containing phosphatidylinositol 3-phosphate and participates in endosomal trafficking. Synonyms for this target antigen include MSTP105, ZFYVE2, early endosome antigen 1, 162kD, early endosome-associated protein, endosome-associated protein p162, and MST105. EEA1 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species.