HUP2 is an alias for the gene, Paired box 3, in humans. Other names include: Paired box protein Pax-3; HuP2; CDHS; WS1. The encoded protein has an amino acid length of 479 and a mass of 53.0 kDa. Other isoforms may exist. HUP2 is a member of the Paired homeobox family. This gene shares homology with other species, including: Frog, Nematode.