A number of ELISA Kits are available that target purine-nucleoside phosphorylase, an alias of the protein, purine nucleoside phosphorylase. The human protein, encoded by the gene PNP, is a member of the PNP/MTAP phosphorylase family. The protein's cellular localization is indicated to be cytoplasmic. Additional synonyms or past names for this protein may include: NP, PRO1837, PUNP. Homology is conserved in other species, such as Mouse, Rat, Frog, Nematode, Chicken.