Table I.

Specific activity of CKX in cellular and extracellular protein preparations of 12-d-old liquid cultures (15°C) of wild-type P. patens and AtCKX2-overexpressing transformants (mean values ± sds)

Specific Activity
TissueMedium
nmol adenine mg−1 protein h−1
Wild type0.54 ± 0.0140.06 ± 0.002
tCKX711.09 ± 0.735.02 ± 0.69
tCKX1614.53 ± 0.649.42 ± 0.99