Molecular Alignment within β-Sheets in Aβ14-23 Fibrils: Solid-State NMR Experiments and Theoretical Predictions Bu, Zimei ; Shi, Yuan ; Callaway, David J. E. ; Tycko, Robert Abstract Publication: Biophysical Journal Pub Date: January 2007 DOI: 10.1529/biophysj.106.091017 Bibcode: 2007BpJ....92..594B