Nucleophosmin/nucleoplasmin 2, or, NPM2, is a human gene. Other names include: Nucleoplasmin-2. The encoded protein has an amino acid length of 214 and a mass of 24.2 kDa. Other isoforms may exist. Nucleophosmin/nucleoplasmin 2 is a member of the Nucleoplasmin family. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog, Chicken.