If a key gene is permanently damaged, there are usually extra copies of the gene nearby.

All we have to do is read it all - to prioritize, to find the key gene, the master switch that drives others.

Drugs are also being sought to hamper the action of key genes of the virus.

As a result, the mother gives birth to mutants, which lack key genes necessary for health.

British researchers identify key genes that "switch off" as the human body ages.

Recognition of these key genes was prerequisite to successful tissue and organ transplantation.

If two populations have common ancestors but a large difference in certain key genes, a guess can be made about how long ago their ancestral peoples separated.

This danger can be avoided by the use of viruses which lack key genes, and which are thus unable to replicate after entering a cell.

This effort led to many discoveries in the genetics of cardiovascular disease, including the identification of key genes associated with heart attack.

Dr. Richard Young of the institute has isolated key genes from the bacteria that cause leprosy and tuberculosis.