Which Statement Is False About the Determination of Protein Structures

Multiple Choice

Which statement is false about the determination of protein structures?

A) NMR can generate sets of structures which may represent protein fluctuations.
B) The structures found by NMR and X-ray crystallography are usually very different.
C) It is often difficult to produce quality protein crystals for X-ray analysis.
D) NMR spectroscopy exposes protein solutions to a magnetic field.