RCrane Copyright 2010-2012 Kevin Keating RCrane programmed by Kevin Keating, Pyle lab, Yale University. All publications resulting from use of this program must acknowledge the following: Keating KS and Pyle AM. Semiautomated model building for RNA crystallography using a directed rotameric approach. Proc Natl Acad Sci USA, 107: 8177-8182 (2010).