Anti-EI24 autophagy associated transmembrane protein antibodies are used for the immunodetection of the protein encoded by the EI24 gene. In humans, the canonical protein has a reported length of 340 amino acid residues and a mass of 39 kDa. Its subcellular localization is in the nucleus, ER, and cytoplasm. Alternative splicing is reported to yield 2 different isoforms for this protein. A member of the EI24 protein family, it is known to act as a negative growth regulator via p53-mediated apoptosis pathway. Other names for this target antigen include PIG8, TP53I8, etoposide-induced protein 2.4 homolog, ectopic P-granules autophagy protein 4 homolog, etoposide induced 2.4, and EPG4. Gene orthologs have been identified in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species.