Are acridines mutagenic for Neurospora?

Sulfur-35 as a Mutagenic Agent in Neurospora.

Hair dyes are mutagenic: identification of a variety of mutagenic ingredients.

We have previously described a sensitive bacterial test for dectecting carcinogens as mutagens. We have previously described a sensitive bacterial test for detecting carcinogens as mutagens. We show here that 89% (150/169) of commercial oxidative-type (hydrogen peroxide) hair dye formulations are mutagenic in this test. Of the 18 components of these hair dyes, nine show various degrees of mutag...

Base excision repair intermediates are mutagenic in mammalian cells

Base excision repair (BER) is the main pathway for repair of DNA damage in mammalian cells. This pathway leads to the formation of DNA repair intermediates which, if still unsolved, cause cell lethality and mutagenesis. To characterize mutations induced by BER intermediates in mammalian cells, an SV-40 derived shuttle vector was constructed carrying a site-specific lesion within the recognition...

Mutagenic products are promoted in the nitrosation of tyramine.

Tyramine is a biogenic compound derived from the decarboxylation of the amino acid tyrosine, and is therefore present at important concentrations in a broad range of raw and fermented foods. Owing to its chemical properties, tyramine can react with nitrite, a common food additive, in the acidic medium of stomach to form N- and C-nitroso compounds. Since toxicology studies have shown that the pr...

Agglutination of motile salmonellas by acridines.

Genetic studies of the determination of Salmonella flagella have suggested that the alternative antigenic phases correspond to two distinct homology groups, i.e., to factors at two distinct genetic loci, one for phase 1 ("specific phase"), and one for phase 2 ("group phase") (Lederberg and Edwards, 1953). It has, however, been generally understood that the two phases were equivalent to one anot...