Table 1.

Relative concentrations of membrane lipids in different organelles from yeast and rat liver

	Rat livera			Yeastb
	Mito (%)	ER (%)	Peroxisome (%)	Mito (%)	ER (%)	Peroxisome (%)
PE	29	19	27.5	26.5	33	23
PC	42	55.5	56.5	40	51	48
PS	7.2	7.2	3.0	3.0	6.6	4.5
PI	3.7	10.5	4.7	14.6	7.5	16
CL	7.6	0	0	13.3	6.6	7
SPM	1.6	4.2	3.7	n.d.	n.d.	n.d

Abbreviations: CL, cardiolipin; n.d., not determined; PC, phosphatidylcholine; PE, phosphatidylethanolamine; PI, phosphatidylinositol; PS, phosphatidylserine; SPM, sphingomyelin.

^aValues taken from Reference 45.

^bValues taken from Reference 46.