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The 2010 Library License is here. As of July 25, 2019, it is based on a Creative Commons CC BY 4.0 license. The license for the 2010 backbone-dependent rotamer library is now less restrictive than it was previously. It is the same for both academia and industry: The library is free, redistributable, and modifiable as long as you acknowledge the source of the library. See details in the link.
A component of a new backbone-dependent rotamer library is shown. The probability of the trans rotamer of valine is plotted as a function of the backbone dihedrals φ and ψ. The residues in the alpha-helix, parallel beta-sheet and left-handed helix regions are depicted as a snowboarder, a skier and a luger respectively. Their heads are the side-chain Cβ atoms. The arms have the same trans-rotamer side-chain conformation while their legs have different backbone conformations in accordance with the residue locations on the Ramachandran map. The heights of the hills are proportional to the backbone-dependent probability of the <trans> rotamer, relative to the <g+> and <g-> rotamers.