. 2009 Aug 24;4:27. doi: 10.1186/1745-6150-4-27

Table 5.

Distribution of zinc-, non-heme iron- and copper-binding proteins in the three domains of life

	Zn^a	Non-heme Fe^b	Cu^c
Bacteria	4.9	3.9	0.3

Archaea	6.0	7.1	0.4

Eukarya	8.8	1.1	0.3

The numbers show the fractions (in %) of proteins with binding sites for Zn, non-heme Fe and Cu, respectively, as related to the total protein content, in the representatives of the three domains of life, determined by application of the same bioinformatics approaches [135].

a – Based on the data from [250];

b – Based on the data from [251];

c – Based on the data from [311];