The researchers considered two possible explanations: Disease suppression might be the result of one or two additional substitutions on the same gene that buffer
the harmful effect of the mutation; or suppression may be caused by numerous small substitutions throughout the genome that form an aggregate «shield.»
Not exact matches
Using several techniques to gauge the
effects of these
mutations, which are the most common type
of variant in the human genome, Akey estimated that more than 80 percent are probably
harmful to us.
Geneticists say large population databases will be essential to pin down what portion
of people carrying potentially
harmful mutations will develop disease, and if the
effects can be mitigated by other genes, for example.