Leaf clippings as protein factories

New technique could produce proteins without genetically engineering whole plants

CHICAGO — A new technique could induce plant leaves to mass produce custom proteins in a matter of weeks. The plant cells could make virtually any kind of protein, including antigens for rapid production of vaccines against new viruses.

By injecting harvested plant leaves with the gene for a desired protein, scientists can make the plant cells produce the protein without ever genetically engineering the entire plant.