Table 1.

Structures of ruthenium complexes used in the covalent attachment to protein amino acid side chain or cofactors (bpy = 2,2′-bipyridine).

Entry	Photosensitizer	Amino acid	References
1		His	[24-26]
2		Asp or Glu	[27]
3		Lys	[28]
4		Lys	[29]
5		Lys or Cys	[32, 33]
6		Cys	[34]
7		Cys	[35]
8		Cys	[36]
Covalent attachment to protein cofactors
9			[37, 38]
10			[39]