G Antigen 3, or, GAGE3, is a human gene. Other names include: GAGE-3; Cancer/testis antigen 4.3; CT4.3; cancer/testis antigen family 4, member 3. The encoded protein has an amino acid length of 118 and a mass of 12.9 kDa. G Antigen 3 is a member of the GAGE family.