FUBP1 and cancer: To confirm the newly identified Kpnβ1 binding partners, the interactions between Kpnβ1 and FUBP1 and Kpnβ1 and CCAR1 were further investigated, as these protein interactions have not previously been validated by Western blot analysis, yet both FUBP1 and CCAR1 proteins have been implicated in cancer development.