GPHA2 is a symbol for the gene, Glycoprotein hormone alpha 2, in humans. Other names include: Glycoprotein hormone alpha-2; Putative secreted protein Zsig51; Thyrostimulin subunit alpha; glycoprotein alpha 2; cysteine knot protein; A2; GPA2; ZSIG51. The encoded protein has an amino acid length of 129 and a mass of 14.2 kDa. GPHA2 is a member of the Glycoprotein hormones subunit alpha family. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog.