Table 4.

Ladderane lipid contribution (%) in ‘Candidatus Scalindua profunda’ enrichments under anaerobic versus oxygen-limited conditions

Ladderane fatty acids	Structure	Relative contribution (%)
		Culture		Natural environmentc
Anaerobica	Oxygen limitationb	OMZ 1d	OMZ 2e	Anoxic basinf
C18[5] fatty acid		36	13	39	66	61
C18[3] fatty acid		30	66	14	17	24
C20[5] fatty acid		23	4	17	5	4
C20[3] fatty acid		11	17	30	12	10

^aCalculated from Rattray and colleagues (2008).

^bValues of lipid composition under oxygen limitation were the averages of values from two replicates.

^cWeighted mean of ladderane fatty acid distributions in water column particulate matter where anammox lipids have been previously reported.

^dArabian Sea Oxygen Minimum Zone, 300–750 m water depth; Rush and colleagues (2012a).

^eEastern Tropical North Pacific Oxygen Minimum Zone, four water column profiles, 55–600 m water depth; Rush and colleagues (2012b).

^fCariaco Basin, 245–346 m water depth; Wakeham and colleagues (2012).