P9, or Exosome component 8, is a human gene encoded by EXOSC8. It may also be known as: Exosome complex component RRP43; Opa-interacting protein 2; OIP-2; Ribosomal RNA-processing protein 43; CBP-interacting protein 3; Opa interacting protein 2; CIP3; EAP2; OIP2; PCH1C; RRP43; Rrp43p; bA421P11.3; p9. The encoded protein has an amino acid length of 276 and a mass of 30.0 kDa. P9 is a member of the RNase PH family. Homologs of this gene exist in other organisms, including: Mouse, Rat, Zebrafish, Frog, Chicken.