I'm trying to find a DNA-PK activity assay that does not depend on radiolabeling with P-32. The kit that was written into my mentor's grant (and the one that almost everyone seems to use) is the Promega SignaTECT kit, which depends on radiolabeling with P-32. Our laboratory is not certified to use radioisotopes (only certified to use the gamma irradiator), so this kit is of no use. I have told my mentor repeatedly after exhaustive Google searches that there are no non-radioactive DNA-PK activity assay kits, but he insists on saying that there is (why he hasn't pointed the one he's thinking about to me, I don't know). Maybe somebody here might know of the existence of one, I hope.
Note: I am not looking for the DNA-PK ELISA kit that measures DNA-PK expression. I saw that and was excited until I saw that it is only good for protein expression, not enzymatic activity.