The license they use is
"This article is distributed under the terms of the Creative Commons Attribution-Non-Commercial-Share Alike licence (http://creativecommons.org/licenses/by-nc-sa/3.0/), which permits distribution, and reproduction in any medium, provided the original author and source are credited. This licence does not permit commercial exploitation, and derivative works must be licensed under the same or similar licence."Too bad they do not do this for all the papers they publish. Maybe Chris Gunter can convince them to do that even though she is now at Hudson Alpha. I think when she was at Nature she helped convince them to do this for genome papers.