DN-Anyone know?

This DNA-like sculpture appeared recently in Paternoster Square, next to St Pauls Cathedral. There's no information plaque, and I haven't yet found out anything about it. Suggestions?

Thanks to JK: "This giant sculpture by Thomas Heatherwick in Bishops Court (by Paternoster Square, opposite Amen Corner) is actually a cooling vent for electrical transformers below."

But if you don't believe this, alternative suggestions still welcome.