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Characterization of S9 fraction used in the third UKEMS collaborative trial
1Health and Safety Executive, Bootle, Merseyside, UK.
Mutagenesis
|January 1, 1990
Abstract:
The S9 preparation utilized by the collaborators in the third UKEMS collaborative study was assayed for the activities of three groups of enzymes and the effect of storage upon the activities. The results obtained indicate that storage of S9 at -196 degrees C for periods of up to 8 months did not unduly affect the activity of the cytochrome P450 isoenzymes measured.