TABLE 2.

Major phospholipid fatty acids and their isotopic compositions for cells of strain MC-1

Parameter or component	Amount (mol%) ina:		δ13C ()b
	MC-1A	MC-1B
Fatty acid
14:0	0.6	0.4
15:0	0.3	0.1
Σ16:1c	60.9	63.1	−21.8d
16:0	29.1	26.5	−24.5
Σ18:1e	9.0	9.9	−22.0f
18:0	0.2	0.1
Total	100.0	100.0
Whole cells			−28.1
CO2			−16.7
ɛFatty acids-whole cellsg			3.7-6.5
ɛWhole cells-CO2g			−11.6

^aValues were determined in duplicate MC-1 samples designated MC-1A and MC-1B.

^bValues were determined for MC-1A plus MC-1B.

^cDominated by 16:1ω7c.

^dWeighed average of 16:1ω7c and 16:1a of an unknown double-bond position.

^eDominated by 18:1ω7c.

^fIsotopic composition for 18:1ω7c only.

^gɛ_A-B = [(1,000 + δ¹³C_A)/(1,000 + δ¹³C_B) − 1] × 1,000.