Abstract:In a previous study, we found that water concentrate from the Waka River, which ‰ows through an industrial area in Wakayama, Japan, showed signiˆcant mutagenicity in Salmonella typhimurium YG1024 without a mammalian metabolic system (S9 mix), and 4-amino-3,3?-dichloro-5,4?-dinitrobiphenyl (ADDB) was identiˆed as a major direct-acting mutagenic constituent in the water concentrate. ADDB induced 428,000 revertants/mg in YG1024 without S9 mix, and this activity was 48 times as high as that with S9 mix. In this st… Show more
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