TABLE 3.

The K_m and V_max values of compounds to EBV TK^a

Compound	Mean Km (μM) ± SD	Mean relative Vmax ± SD
L-I-OddU	5.5  ± 0.08	3.9  ± 0.25
L-FMAU	0.8  ± 1.2	3.0  ± 0.51
dThd	4.5  ± 0.9	1.00

^aThe enzyme used in these experiments was the EBV affinity-purified enzyme from the PET-TK B1B plasmid described in Materials and Methods. These numbers represent the average of five experiments.