Ready-to-use ELISA kits are available for the detection of etoposide induced 2.4 mRNA, an alias of the protein, EI24 autophagy associated transmembrane protein. The official gene symbol is EI24. The protein, with a mass of 39 kDa and length of 340 residues, is reported to be cytoplasmic and nuclear. It is a member of the EI24 family and may be known by other names, including: PIG8, EPG4, p53-induced gene 8 protein, etoposide induced 2.4, ectopic P-granules autophagy protein 4 homolog, and etoposide-induced protein 2.4 homolog.