Dear Crystallographers, I am looking for a reference or precedent for variation of twin fraction within a single dataset--does anyone know of such? Could also be in the small molecule literature, but I can't think of a great way to search for this particular phenomenon. Any pointers in the right direction much appreciated. All the best, Jacob Keller ******************************************* Jacob Pearson Keller, PhD Looger Lab/HHMI Janelia Research Campus 19700 Helix Dr, Ashburn, VA 20147 email: [log in to unmask] *******************************************