Table 1.

Oxygen affinities of selected bacterial terminal oxidases as determined by the deoxygenation of globins.

Bacterium and oxidase	Km(O2) (μM)	Reference
E. coli cytochrome bd-II	0.24	This work
E. coli cytochrome bd-I	0.003–0.008	[32]
Azotobacter vinelandii cytochrome bd	4.5	[54]
Klebsiella pneumoniae cytochrome bd	0.02	[74]
Campylobacter jejuni cytochrome bd (cio or cyanide insensitive oxidase)	0.8	[75]
E. coli cytochrome bo′	0.016–0.35	[67]
Campylobacter jejuni cytochrome cb’	0.04	[75]
Bradyrhizobium japonicum cbb3-type oxidase	0.007	[76]