This indicates stronger negative selection for alteration of corresponding protein sequences.
Restriction of ground water withdrawal by German environmental regulation may require an adaptation of crop selection and alterations in agricultural practice also in regions with comparable conditions.
For instance, in primate APOBEC3G evolution, positive selection favors alterations of amino acid charge, which involves the interaction of APOBEC3G and HIV-1 Vif [17].
Likewise it has been postulated "that tumor genomes are shaped by selection for alterations that promote survival and growth advantage, as well as by the particular dysfunctions in genes responsible for maintenance of genetic integrity" (Snijders et al., 2003).
DNA alterations are necessary for the evolution by natural selection 7. DNA alterations are necessary for speciation 8. DNA alterations are needed to cause species diversity.
The accumulation of SNPs in the human genome is like a snapshot of human evolutionary history in which genes, especially those with specific functions, are under continuous natural selection pressure and alteration by mutation, genetic drift and gene flow.
Although the premise of our Discussion is that the driving force behind 8p rearrangements is selection for the alteration of cancer genes, the same pattern of rearrangements might be observed if the driving force was the mechanism of breakage e.g the presence of fragile sites on 8p.
Cancer evolves through the emergence and selection of molecular alterations.
However, these infiltrating lymphocytes may lead to the selection of HLA alterations in tumor cells.
Even when culturing is possible, growth biases can result in selection for genome alterations such as gene loss.
