Anti-LEMD1 antibodies are used in the immunodetection of the protein LEM domain containing 1. In humans, the canonical protein has a reported length of 181 amino acid residues and a mass of 20.3 kDa. Its subcellular localization is in the membrane. Alternative splicing is reported to yield 6 different isoforms for this protein. It is reported to have testis-specific expression. Synonyms for this target antigen include LEM domain protein 1, cancer/testis antigen 50, and LEM domain-containing protein 1.