. Author manuscript; available in PMC: 2010 Sep 30.

Published in final edited form as: Curr Pharm Des. 2007;13(32):3344–3356. doi: 10.2174/138161207782360636

Table 2.

Mass Peak Assignments for Lipid Species in Negative Ion Mode

Species^a	[M-H]⁻ (Da)^b	Brain	Liver	Kidney	Heart
PE 34:2a	714.51	---	714.50	714.52	714.55
PE 34:1a	716.52	716.54	---	716.52	---
PE 36:4p	722.51	722.52	---	722.51	---
PE 36:3p	724.53	724.53	---	---	---
PE 36:2p	726.54	726.54	---	---	---
PE 36:1p	728.56	728.56	---	---	---
PE 36:4a	738.51	---	738.51	738.51	738.53
PE 36:3a	740.52	---	740.54	740.52	740.55
PE 36:2a	742.54	742.55	742.54	742.54	742.56
PE 36:1a	744.55	744.56	---	744.57	---
PE 36:0a PE 38:6p	746.57 746.51	746.53	---	746.52	746.53
PA 40:6 PG 34:1 PS 40:6–88	747.50 747.52 747.50	747.52	---	747.52	747.54
PE 38:5p	748.53	748.52	---	748.53	748.54
PE 38:4p	750.54	750.55	---	750.54	750.55
PE 38:2p	754.58	754.57	---	---	---
PE 38:1p	756.59	756.59	---	---	---
PE 38:6a PS 34:0	762.51 762.53	762.51	762.51	762.51	762.53
PE 38:5a	764.52	764.53	764.52	764.53	---
PE 38:4a	766.54	766.54	766.54	766.54	766.55
PE 40:6p	774.54	774.54	---	774.54	774.56
PE 40:5p	776.56	776.55	---	---	776.56
PE 40:4p	778.58	778.57	---	---	---
PS 36:2	786.53	786.53	---	786.52	---
PS 36:1	788.54	788.55	---	788.54	---
PE 40:6a	790.54	790.54	790.53	---	790.55
ST 18:0 PS 38:6	806.55 806.50	806.55	---	---	---
PS 38:4	810.53	810.53	---	810.53	---
PS 38:1	816.58	816.57	---	---	---
PI 34:2	833.52	---	833.52	---	---
PS 40:6 ST20:0	834.53 834.58	834.54	---	834.52	834.53
PI 36:4	857.52	857.52	857.52	857.51	---
PI 36:3	859.53	---	859.53	---	---
PI 36:2	861.55	---	861.54	861.55	861.55
ST 22:0	862.61	862.61	---	---	---
PI 36:1	863.56	---	863.55	---	---
ST 22:0 (OH)	878.60	878.60	---	---	---
PI 38:6	881.52	---	881.53	881.52	---
PI 38:5	883.53	---	883.54	883.53	---
PI 38:4	885.55	885.55	885.55	885.55	885.55
PI 38:3	887.56	---	887.56	---	---
ST 24:1	888.62	888.62	---	---	---
ST 24:0	890.64	890.64	---	---	---
ST 24:1 (OH)	904.62	904.62	---	---	---
ST 24:0 (OH)	904.63	906.63	---	---	---
PI 40:6	909.55	---	909.56	---	909.55
PI 40:5	911.56	---	911.57	---	---
ST 26:0	918.67	918.64	---	---	---
ST 26:0 (OH)	934.67	934.65	---	---	---

PC and PE species number equal the total length and number of double bonds of both acyl chains. SM specie number corresponds to the length and number of double bonds of the acyl chain attached to the sphingosine base.

Masses are theoretical monoisotopic.