Alpha-sarcoglycan, or Sarcoglycan alpha, is a human gene encoded by SGCA. It may also be known as: Alpha-sarcoglycan; 50 kDa dystrophin-associated glycoprotein; 50DAG; Adhalin; Dystroglycan-2; Alpha-SG; 50kD DAG; limb girdle muscular dystrophy 2D; 50-DAG; ADL; DAG2; DMDA2; LGMD2D; SCARMD1; sarcoglycan, alpha (50kDa dystrophin-associated glycoprotein). The encoded protein has an amino acid length of 387 and a mass of 42.9 kDa. Other isoforms may exist. Alpha-sarcoglycan is a member of the Sarcoglycan alpha/epsilon family. Homologs of this gene exist in other organisms, including: Frog.