Both companies reported they had successfully cloned pigs in which a single copy of the alpha 1, 3 galactosyl transferase
gene had been knocked out - "single knock-out pigs.
A company spokesman in Edinburgh said the ability to 'knock out' both copies of the alpha 1,3 galactosyl transferase
(GT) gene was a vital step forward.
Scientists at PPL, which was behind the cloning of Dolly the sheep, have found a way to inactivate the alpha 1,3 galactosyl transferase