ShiftX
ShiftX (Shifts from X-ray structures) is a freely available web server for rapidly calculating protein chemical shifts from protein X-ray (or NMR) coordinates. Protein chemical shift prediction (also known as protein chemical shift calculation) is particularly useful in verifying protein chemical shift assignments, adjusting mis-referenced chemical shifts, refining NMR protein structures (via chemical shifts) and assisting with the NMR assignment of unassigned proteins that have either had their structures (or the structures of a homologous protein) determined by X-ray or NMR methods.