In the progress of research on antimutagenesis of Chinese herbal medicine,the main study both internal and abroad is concentrated on screening of antimutagen, but definite reports on mechanisms involved in antimutagenesis of Chinese herbal medicine are hardly seen. Many pharmacological actions have been reported about semen astragali complanati (AC),but the report of antimutagenesis is scarce. This research is about the antimutagenesis and mechanism of semen astragali complanati. Taking CP as m...