PWP1 is a symbol for the gene, PWP1 homolog, endonuclein, in humans. Other names include: Periodic tryptophan protein 1 homolog; Keratinocyte protein IEF SSP 9502; endonuclein; IEF-SSP-9502; PWP1 homolog (S. cerevisiae). The encoded protein has an amino acid length of 501 and a mass of 55.8 kDa. Other isoforms may exist. PWP1 is a member of the WD repeat PWP1 family. This gene shares homology with other species, including: Mouse, Yeast, Rat, Zebrafish, Frog, Chicken.