NMR structures in the PDB do not list the reliability factor, R, and the temperature factor, B, as is customary for x-ray structures. This is due to the fact that _____________________.
I. NMR structures have a lower reliability
II. temperature does not affect NMR structures
III. NMR does not use diffraction data and electron density maps
IV. NMR uses chemical shift correlations

Question

Quizplus · Accepted Answer

NMR structures do not use diffraction data and electron density maps, which are necessary for calculating the reliability factor, R, and the temperature factor, B. Instead, NMR relies on chemical shift correlations to determine structures.

NMR Structures in the PDB Do Not List the Reliability