This single-state model representation can be confusing for scientists using NMR structures. The individual conformer models in the single-state representation are not meant to describe actual conformers contributing to the Boltzmann distribution of states present in the sample; rather the conformer collection provides information about the consistency of modeling. Although each conformer is considered to be a good fit to the data, the coordinate uncertainty in different regions can only be assessed by analyzing the conformer collection as a whole. The single-state model representation also does not provide a statistically reliable estimate of the atomic coordinate precision based on experimental measurement uncertainties, although Bayesian methods have been proposed for this purpose . Despite its limitations, the prevailing convention for biomolecular structure modeling using NMR data continues to be the singlestate model representation. When using such models, it is crucial to distinguish regions that are welldefined from the experimental data versus less precise regions where atomic positions are highly uncertain. This distinction is critical for the correct application of structure validation methods, which generally apply only to well-defined regions . Accordingly, it is important that the single-state model representation is conveyed in a simple way to users of NMR structures.