He is using enzymes such as polymerases, nucleases and exonucleases that can also copy, cut and destroy nucleic-acid strands.

ECONOMIST: DNA computing

Dana Carroll, a biochemist at the University of Utah who has licensed some research to Sangamo, has run fruit fly experiments using zinc finger nucleases in which the flies' genomes were cut in unintended places apart from the target area.

FORBES: A Whole New Crop