| Nek 9 , a novel FACT associated protein , modulates interphase progression . ^^^ Here we report the identification of a novel interacting and functional partner of FACT , Nek 9 . ^^^ Nek 9 forms a stable , approximately 600 kDa complex with FACT in the interphase nuclei . ^^^ When complexed with FACT , Nek 9 exhibits markedly elevated phosphorylation on Thr ( 210 ) . ^^^ Cell cycle analysis on the Nek 9 ( dsRNAi ) cells directly implicated Nek 9 in maintaining proper G ( 1 ) and S progression , a role temporally correlated to the formation of a phospho Nek 9 FACT complex . ^^^ |