Avoiding the white stuff may soon become a thing of the past now that a New Zealand team has created a cow that produces hypoallergenic milk. About 1.5 per cent of infants are allergic to a milk protein called betalactoglobulin (BLG). So Stefan Wagner and his colleagues at AgResearch in Hamilton, New Zealand, identified the genetic code for the protein and then made a complimentary genetic structure that shut down BLG production when injected into a cell's nucleus. They transferred a treated nucleus...