Ariads scientists will try to prod the gene into producing more or less bone formation protein, switching the gene on and off.

FORBES: A hail of silver bullets

HERC2 has no effect on eye color, but it contains an unexpressed segment of DNA that is needed for the switching on of a nearby gene called OCA2, as demonstrated by newly published work by Robert-Jan Palstra and others at Erasmus University in the Netherlands.

WSJ: Matt Ridley on Human Culture's Effect on Genes | Mind & Matter

Although Monsanto has promised to put its terminator-gene system in deep-freeze, the molecular switching that underlies it remains a hot topic at many of the world's leading agri-biotechnology firms.

ECONOMIST: Terminator genes