Table 1.

Fatty acids identified in archaeal cell extracts of S. solfataricus, I. hospitalis, and I. hospitalis-N. equitans.

Fatty acid	Cell culture
	S. solfataricus	I. hospitalis	I. hospitalis-N. equitans
Tetradecanoic acid (C14:0)		X	X
Hexadecanoic acid (C16:0)	X	X	X
9-Hexadecenoic acid (C16:1)	X∗	X	X
Octadecanoic acid (C18:0)	X	X	X
9-Octadecenoic acid (C18:1)	X∗	X	X
9,12-Octadecadienoic acid (C18:2)		X	X
9,12,15-Octadecatrienoic acid (C18:3)		X∗	X∗
Tetracosanoic acid (C24:0)		X∗	X∗
Hexacosanoic acid (C26:0)		X∗	X∗

^∗denotes trace amounts, not able to confirm unambiguously cocultures.