Comutagen
Encyclopedia
A comutagen is a substance that is not a mutagen
by itself, but in the presence of a mutagen, enhances mutagenic activity.
Mutagen
In genetics, a mutagen is a physical or chemical agent that changes the genetic material, usually DNA, of an organism and thus increases the frequency of mutations above the natural background level. As many mutations cause cancer, mutagens are therefore also likely to be carcinogens...
by itself, but in the presence of a mutagen, enhances mutagenic activity.