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Researchers from the University of Chicago analyzed the genomes of 209 unrelated individuals from three distinct human populations: East Asians, Europeans and Yorubans from Nigeria. Each population contained roughly 250 positively selected genes; however, most of the affected genes differed depending on the group.
Many genes were found to be evolving in all three of the human populations studied. The specific functions of many of the genes are not known, but the researchers were able to separate them into broad categories. These categories include:
Olfaction: the researchers found many genes important for taste and smell.
Reproduction: involved in things like sperm mobility and egg fertilization.
Increasing brain size
Bone development and skeletal changes
Carbohydrate metabolism: positive selection was observed for genes involved in breaking down mannose in Yorubans, sucrose in East Asians, and lactose for Europeans. (Mannose is a sweet secretion found in some trees and shrubs, sucrose is common table sugar, and lactose is a sugar found in milk.).
Disease resistance and pathogen protection
Metabolism of foreign compounds, such as exotic plant proteins or animal toxins.
LiveScience.com
Originally posted by iori_komei
This is, in my opinion one of the greates scientific discoveries in quite some time.
Originally posted by Ralph_The_Wonder_Llama
Originally posted by iori_komei
This is, in my opinion one of the greates scientific discoveries in quite some time.
I couldn't disagree more.
(snip)
Blah blah blah
(snip)
[url=http://www.the-scientist.com/article/display/23212/]Time for a Human Interactome Project?[/url
For more than 50 years scientists like Max Delbrück and Conrad H. Waddington have been proposing models based on the idea that macromolecules form complex networks of functionally interacting components, and suggesting that the molecular mechanisms underlying most biological processes correspond to particular steady states adopted by such cellular networks.
Such systems-level conjectures complement molecular biology's reductionist, one-gene/one-function point-of-view in several ways. First, they provide a framework for understanding general biological properties like robustness and adaptability. It is unclear, for example, why more than half of all unique yeast genes (i.e., those without any recognizable genomic homolog) are dispensable for viability. These models also address limitations of the one-gene/one-function paradigm, such as the "gene number paradox": how species as different in complexity as worms and humans could contain approximately the same number of genes.
Systems-level models also provide testable hypotheses to explain, and not merely describe, cellular events like differentiation and homeostasis. Finally, they could aid early drug development, by considering a drug's actions in the context of the cellular networks in which the drug target functions.