This tree is constructed from an analysis of small subunit rRNA sequences sampled from approximately 3,000 species from throughout the Tree of Life. The species were chosen based on their availability, but most of the major taxonomic groups were included,
scientists reported that a person's risk of a heart attack is doubled if he or she produces a particular version of FLAP, known more technically as 5-lipoxygenase activating protein. A troublesome variant of this protein boosts production of the inflammat
The novel neuropeptides hypocretin and orexin, located recently on the lateral hypothalamic cells, has been linked to both feeding and sleeping/waking cycles. Recent studies have found an association between defects in hypocretin/orexin and narcolepsy.
A genetic breakthrough reveals reasons for human differences; it now appears much of the variation is explained instead by people having multiple copies of some key genes that make up the human genome. Until now it was believed the variation between p