Cylicin, basic protein of sperm head cytoskeleton 2, or, CYLC2, is a human gene. Other names include: Cylicin-2; Cylicin II; Multiple-band polypeptide II. The encoded protein has an amino acid length of 348 and a mass of 39.1 kDa. Other isoforms may exist. This gene shares homology with other species, including: Mouse, Rat.