Most was to pay for the development of new medicines for chronic lung diseases such as cystic fibrosis and emphysema, which can, in theory, be made from proteins in the milk of a cloned flock.

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Their milk looks and tastes like the real thing, but once its proteins are filtered and purified into a fine white powder, they can be spun into tough thread.

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The treatment is produced transgenically - meaning that human proteins are injected into the genetic material of a sheep and collected through its milk.

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