“…The data suggest that the generally described increase in protein kinase CK2 activity in tumor cells may to some extent result from a deregulation in subunit biosynthesis or degradation. This is at least partly due to the presence of an excess of enzymatically active protein kinase asubunit but also to a significantly higher presence of the noncatalytic b-subunit [126,127]. A very exciting finding was reported some time ago by [52], who showed that the CK2b cDNA could somehow rescue X. pigmentosum cell lines towards UV-sensitivity.…”