Table 2. Mutation frequency (M. F.) induced by treatment with Ru1 or cisplatin, as determined by HPRT-forward mutation assay in V79 Chinese hamster cells ^a .

	M.F. b	Rel. M.F. c
Control	6.3 ± 2.4	1.0
Ru1	36.7 ± 7.3	5.8
Cisplatin	65.5 ± 11.3	10.4

^aCells were treated with 2 μM of each complex for 24 h.

^b6-TG resistant mutations per 1 × 10⁵ viable cells.

^cRatio of induced to spontaneous mutations.