. "During assembly of the complex, component of the small nucleolar ribonucleoprotein particles containing H/ACA-type snoRNAs (H/ACA snoRNPs) which contains CBF5, NAF1, NHP2 and NOP10 proteins. Interacts with SHQ1. Interacts directly with CBF5. Interacts with hyperphosphorylated C-terminal domain (CTD) of RNA polymerase II large subunit (RPB1)." .