. 2012 May 5;367(1593):1204–1212. doi: 10.1098/rstb.2011.0311

Table 4.

Specific activity of Marinobacter nitrous oxide reductase (N₂OR) isolated from the different growth conditions. The table also shows the main redox state of the CuZ centre in each redox state. asc, ascorbate; dth, dithionite.

redox state	‘aerobic’		‘anaerobic1’		‘anaerobic2’
redox state	activity (U mg⁻¹)	redox state CuZ centre^a	activity (U mg⁻¹)	redox state CuZ centre^a	activity (U mg⁻¹)	redox state CuZ centre^a
fully oxidized	0.4	60% [2Cu²⁺ : 2Cu⁺]	0.4	60% [2Cu²⁺ : 2Cu⁺]	1.1	[1Cu²⁺ : 3Cu⁺]
asc-reduced	0.3	60% [2Cu²⁺ : 2Cu⁺]	0.3	60% [2Cu²⁺ : 2Cu⁺]	0.9	[1Cu²⁺ : 3Cu⁺]
dth-reduced	0.2	[1Cu²⁺ : 3Cu⁺]	0.3	[1Cu²⁺ : 3Cu⁺]	0.2	[1Cu²⁺ : 3Cu⁺]
fully reduced	88.0	[4Cu⁺]	96.1	[4Cu⁺]	92.4	[4Cu⁺]

^aThe CuZ centre content for ‘aerobic’ and ‘anaerobic2’ N₂OR samples was determined based on the EPR spectra, whereas the one indicated for ‘anaerobic1’ was estimated by comparing its visible spectral features with those of the ‘aerobic’ sample.