. 1999 Aug 31;96(18):10489–10494. doi: 10.1073/pnas.96.18.10489

Table 1.

Oxidoreductase activities of the CHO-K1/dhfr⁻ parental cell line and the MCRA-transfected cell line (CHO-MCRA-1) expressing the MCRA gene

Enzyme^†	Activity^*
Enzyme^†	CHO-K1/dhfr⁻	CHO-MCRA-1
NADPH–cytochrome c (P450) reductase	8.7 ± 0.8	7.6 ± 0.6
NADH–ferricyanide reductase	1966 ± 214	1788 ± 138
DT–Diaphorase	8.7 ± 3.6	5.2 ± 2.2

All enzyme activities were determined by using standard assays as described (18). Values are mean ± SEM of six determinations.

^†

No detectable xanthine oxidase or xanthine dehydrogenase activity was observed in either cell line.