John Clark, molecular biologist, who has died at 52, "was an exceptional man—a founder of applying molecular technology to farm animals," said his colleague Grahame Bulfield, former director of Edinburgh's Roslin Institute.

Clark, who only last year succeeded Bulfield as director of the Roslin, had been a transforming influence on the institute since its creation in 1993, Bulfield told The Scientist. Clark was found hanged in his holiday home earlier this month.

During its early years, "Roslin moved from being a bog-standard 'feed-em and weigh-em' farm animal research institute to a world-famous biotechnology institute," said Bulfield, now head of the University of Edinburgh College of Science and Engineering. "Now really it's become a mainstream biotech lab using things like embryonic stem cells. With myself and Ian Wilmut, Clark was the one molecular [biologist] driving force that aided that transition."

Roslin became a favorite of the mass...

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