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- _4 value "cells were left untreated or treated with H202 and formaldehyde followed by incubation with the profluorescent Z-DEVD-rhodamine 110 substrate. The catalytic activity of the two effectors, caspase-3 and caspase-7, was determined by measuring the fluorescence of the cleavage product. In the presence of 100 Amol/L H2O2, the caspase-3/7 activity was 8- to 11-fold elevated in parental, mock, and Wt K-ras?transfected cells in comparison with the untreated cells, whereas the enzymatic activity was only 2- to 3-fold enhanced in the two K-ras mutants (Fig. 5D). It is noteworthy that an altered caspase activity in cells treated with formaldehyde was not observed (data not shown)." provenance.
- _4 wasQuotedFrom 19074874 provenance.