Anti-melanoma antigen family E1 antibodies enable researchers to detect and measure the melanoma antigen family E1 antigen in biological samples. This target is a reported synonym of the MAGEE1 gene, which encodes MAGE family member E1. This protein is known to function in the regulation of transcription, among other biological roles. The human version of melanoma antigen family E1 has a canonical amino acid length of 957 residues and a protein mass of 103.3 kilodaltons. It is reported to be localized in the cell membrane, nucleus, and cytoplasm of cells and notably expressed in many tissues, such as the cerebral cortex and testis. Other names for this target antigen include melanoma-associated antigen E1, MAGE-E1 antigen, and alpha-dystrobrevin-associated MAGE Protein.