TSA2 is an alias for the gene, Radial spoke head 1 homolog (Chlamydomonas), in humans. Other names include: Radial spoke head 1 homolog; CT79; Male meiotic metaphase chromosome-associated acidic protein; Meichroacidin; Testis-specific gene A2 protein; RSP44; RSPH10A; TSGA2. The encoded protein has an amino acid length of 309 and a mass of 35.1 kDa. Other isoforms may exist. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog, Chicken.