Table 1.

Correlation values for fitting the S6 helix (residues 4910 to 4957) to open- and closed-channel densities

	Open densitiesa	Closed densityb
Closed structure (PDB code 3J8H)	0.84 ± 0.02	0.98
Open model	0.93 ± 0.02	0.85
Open structure (PDB code 5TAL)	0.98	0.81

^a Open-channel RyR1 densities (EMD-8376, EMD-8377, and EMD-8378).

^b Closed-channel RyR1 density (EMD-2807).