Table 2. Comparison of lipids reported in the current study to those reported for HMGECs [4] and epithelial cells [37] in previous reports.

	Sullivan et al (14 days) [4]		Sampaio et al (3 days) [37]		Hampel et al (3 days)
	% lipids (in common in all 3 studies)	% lipid (Sullivan & Hampel)	% lipids (in common in all 3 studies)	% lipid (Sampaio & Hampel)	% lipids (in common in all 3 studies)	% lipid (Sullivan & Hampel)	% lipid (Sampaio & Hampel)
PE	2.6	2.4	15.2	14.8	10.8	10.3	10.1
PS	3.6	3.4	8.3	8.1	14.5	13.7	13.5
PC	37.9	35.5	34.5	33.7	33.7	32.0	31.5
SM	16.8	15.8	9.3	9.1	6.0	5.7	5.6
DAG				1.7			5.6
Cer				0.8			1.0
CE		4.4				4.6
Chol	39.1	36.7	32.6	31.8	34.9	33.2	32.6
WE		1.9				0.5

phosphatidylethanolamine (PE), phosphatidylserine (PS), phosphatidylcholine (PC), sphingomyelin (SM), diacylglycerol (DAG), ceramide (Cer), cholesterol ester (CE), free cholesterol (Chol), and wax ester (WE)