published reports ( hellung-larsen and klenow , 1969 ; srivastava et al. , 1981 ) describe the formation of precipitable complexes of mg2+ , f- , and [ 3h ] thymidine triphosphate which suggests that autoradiographic measurement of uds may lead to artifacts when testing naf unless extensive washing of the cultures is employed .
C0016327
f
C0037508
naf