Published June 2001 | Version Published Journal Article Metadata-only Cholesterol Modification of Sonic Hedgehog Is Required for Long-Range Signaling Activity and Effective Modulation of Signaling by Ptc1 Creators Lewis, Paula M. Dunn, Matthew P. McMahon, Jill A. Logan, Malcolm Martin, James F. St-Jacques, Benoit McMahon, Andrew P. Additional details Caltech Custom Metadata Publication Status Published