Scientists find "werewolf" gene......
Scientists have discovered a genetic mutation responsible for a disorder that causes people to sprout thick hair on their faces and bodies.
Hypertrichosis, sometimes called "werewolf syndrome" is a very rare condition, with fewer than 100 cases documented worldwide. But researchers knew the disorder runs in familes, and in 1995 they traced the approximate location of the mutation to a section of the X chromosome (one of the two sex chromosomes) in a Mexican family affected by hypertrichosis.
Men with the syndrome have hair covering their faces and eyelids, while women grow thick patches on their bodies. In March, a Thai girl with the condition got into the Guinness Book of World Records as the world's hairiest child.
A man in China with congenital hypertrichosis helped researchers break the case. Xue Zhang, a professor of medical genetics at the Peking Union Medical College, tested the man and his family and found an extra chunk of genes on the X chromosome.
The extra DNA may switch on a hair-growth gene nearby, resulting in runaway furriness. The best bet for a culprit, wrote study researcher Pragna Patel of the University of Southern California, is a gene called SOX3, which is known to play a role in hair growth.
Live Science article, June 5, 2011
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