(b) Structures.

	D max,THE (Å)	R g,THE (Å)	MWSTR (kDa)
X-ray, resting (PDB entry 4u2p)	171.0	56.1	369
EM, active (PDB entry 5weo)	175.0	58.7	366
EM, desensitized (PDB entry 5vhz)	167.0	55.8	366
EM, class 3 (EMDB-2688)	179.0	64.1	372
X-ray, GYKI-bound (PDB entry 5l1h)	169.5	57.3	359