TSA1 is an alias for the gene, Lymphocyte antigen 6 complex, locus E, in humans. Other names include: Lymphocyte antigen 6E; Ly-6E; Retinoic acid-induced gene E protein; RIG-E; Stem cell antigen 2; SCA-2; Thymic shared antigen 1; TSA-1; retinoic acid induced gene E; RIGE. The encoded protein has an amino acid length of 131 and a mass of 13.5 kDa. Other isoforms may exist. This gene shares homology with other species, including: Mouse, Rat, Frog, Chicken.