Inhibition of mutagenicity was expressed as percentage decrease of reverse mutation and calculated as: (2) % inhibition = (a − b a − c ) × 100, where a is the number of histidine revertants induced by mutagen, b is the number of histidine revertants induced by mutagen in the presence of plant extract, and c is the number of revertants induced in negative control.
Inhibition of mutagenicity was expressed as percentage decrease of reverse mutation and calculated as (1) Percent inhibition = [ (a − b ) (a − c ) ] × 100, where a = number of histidine revertants induced by mutagen, b = number of histidine revertants induced by mutagen in the presence of test compound, and c = number of revertants induced in negative control.
The mutation frequencies conferred by different mutagens in different organisms have been extensively documented [1].
It is only assumed that the process of interest is based on information contained in DNA sequences and that can be altered by mutagens.
In addition, almost 80%% of highly expressed non-TE genes have insertion mutations, indicating that highly expressed genes in rice chromosomes are more likely to have mutations by mutagens such as T-DNA, Ds, dSpm and Tos17.
In addition to mitogens, mammographic density may also be influenced by mutagens.
The presence of the complexes was manifested by a bathochromic shift of the absorption spectra, as well as by strong quenching of the fluorescence of each of these mutagens in the presence of CHL.
Mutagens in feces of three adult volunteers were fractionated by treatment of the feces with blue cotton followed by chromatography on a carboxymethyl cellulose column.
In 1969, a group of scientists concerned with the health hazards posed by environmental mutagens formed the Environmental Mutagen Society to encourage interest in and the study of mutagens in the human environment.
In the future, similar approaches on other tumors and other mutagens are expected to reveal further clues for the role of environmental mutagens in human carcinogenesis.
