Table 3. The 16 representatives that capture the structural variation present in the type 2 enzymes.

UniProt ID	PDB code, chain	Organism	Protein	Functional state
P77444	6uy5, A	E. coli	SufS	Cys364-S-S− out-2
P77444	6mr2, A	E. coli	SufS	Cys364-S-S− in
P77444	6mri, A	E. coli	SufS	Cys364-S-S− out
P77444	6o11, A	E. coli	SufS	Cys–aldimine intermediate
Q46925	4lw4, A	E. coli	CsdA	CsdE-bound
Q46925	4lw2, A	E. coli	CsdA	Resting state
Q46925	5ft8, A	E. coli	CsdA	CsdE-bound
Q46925	5ft8, K	E. coli	CsdA	CsdE-bound
O32164	5j8q, A	B. subtilis	SufS	Resting state
O32164	5xt5, A	B. subtilis	SufS	SufU-bound
O32164	5zs9, A	B. subtilis	SufS	Resting state
O32164	5zsk, A	B. subtilis	SufS	Ala–aldimine intermediate
Q93WX6	4q75, A	A. thaliana	NSF2	Cys364-S-S− out
B6YT87	5b7s, A	T. onnurineus	TON_0289	Resting state
Q55793	1t3i, A	Synechocystis	Csd	Resting state
Q5ZXX6	6c9e, A	L. pneumophila	Lpg0604	Resting state