Sec61 alpha, or Sec61 translocon alpha 2 subunit, is a human gene encoded by SEC61A2. It may also be known as: Protein transport protein Sec61 subunit alpha isoform 2-2 2 subunit (S. cerevisiae). The encoded protein has an amino acid length of 476 and a mass of 52.2 kDa. Other isoforms may exist. Sec61 alpha is a member of the SecY/SEC61-alpha family. Homologs of this gene exist in other organisms, including: Mouse.