Gallic acid is classified as a mutagen and a teratogen. As an alkylating agent, it also a mutagen. Ionizing radiation is not a particularly strong mutagen. Cigarette smoke acts as a chemical mutagen on germ cell DNA. The mechanism by which mutation arises varies according to the causative agent, the mutagen, involved. The mutant strain that lacked Pol I was isolated and treated with a mutagen. Some experiments on bacterial species have demonstrated it to be a mutagen. Ever since the discovery of ENU as the most potent mutagen by Russell et al. The type of DNA damage produced depends on the type of mutagen. As a result, they are all affected by the leaking chemical, which is a mutagen. This variety of vibranium is a powerful mutagen. Venus was one of five turtles exposed to mutagen in the sewers. He was supposedly killed by Image character Deathwatch by having his brain drained of mutagen. Members of the Foot Clan break into the facility to steal an alien mutagen. EMS is often used in genetics as a mutagen.