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Striking back

Striking back

作者:强岷  时间:2019-03-06 09:10:01  人气:

By Anil Ananthaswamy SAFER, cheaper and more effective snake antivenom may soon be made using DNA technology. The development could help overcome an imminent shortage. “There’s a crisis in antivenom production worldwide, particularly in Africa. The traditional manufacturers are closing down for economic reasons,” says David Warrell of Oxford University. Antivenom is still made by a century-old method. Animals, mainly horses, are injected with increasing levels of venom. The antibodies they produce are then extracted and purified. But such antiserum has serious shortcomings. Many of the antibodies it contains are useless, because they target harmless components of the venom,