17. "Malate-like ligand" TEO (tp2-2803L, 2Fo-Fc contoured 2.0 sigma)

22. Electron density for the Fe3S4 cluster, contoured at 12 s (magenta) to resolve the irons and at 5 s (cyan) to include also the sulfurs. From a 2Fo-Fc map, PDB entry 1YQ3

23. From a 2Fo-Fc map, new 1.8Å structure.
Electron density for the Fe3S4 cluster, contoured at 15 s (magenta) to show the irons, and at 6 s (cyan) to include also the sulfurs.
From a 2Fo-Fc map, new 1.8Å structure.

30. Difference spectra showing the changes inducedby binding different ligands

38. 1yq4, 2Fo-Fc contoured 1.7 sigma

39. 1yq4, 2Fo-Fc contoured 1.7 sigma

44. tp2401, 2Fo-Fc contoured 1.7 sigma

46. tp2401, 2Fo-Fc map contoured 1.8 sigma