Table 1. Benchmark data set.

Assembly	EMDB ID	EM resolution (Å)	PDB code	No. of subunit residues	No. of assembly residues	Structure	SCOP class of chains
Saf pilus type A	1494	17	3cre	19, 123, 144	286	Heterocomplex, asymmetric	All-β
ParM filament	1980	7.2	4a6j	320	960	Homocomplex, asymmetric	α/β
Biomphalaria glabrata acetylcholine-binding protein type 1	2055	6	4aod	205	1025	Homocomplex, symmetric	All-β
Antibody VRC-PG04 in complex with HIV-1 gp120	2427	23	3se9	208, 228, 353	789	Heterocomplex, asymmetric	All-β, α+β
Lidless Mm-cpn in the open state	5140	8	3iyf	521	4168	Homocomplex, symmetric	All-α, α+β, α/β
Conjugal transfer protein TrwB	5505	20	1e9r	437	2622	Homocomplex, symmetric	α/β
Circadian clock protein KaiC	5672	16	3dvl	519	3114	Homocomplex, symmetric	α/β