A number of ELISA Kits are available that target Ly66, an alias of the protein, lymphocyte activating 3. The human protein, encoded by the gene LAG3, is a member of the LAG3 family. The protein's cellular localization is indicated to be membrane-associated and secreted. Additional synonyms or past names for this protein may include: CD223. Homology is conserved in other species, such as Mouse, Rat.