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Wm. Craig Byrdwell, phd |
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Resources for Lipid Analysis in the 21st Century |
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Copyright © 2005-2011 Byrdwell.com
The figures and tables on this website are copyrighted in 2005-2011 by William Craig Byrdwell. If you use these tables please reference www.Sphingomyelin.com |
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Calculated monoisotopic masses of Sphingomyelin and Dihydrosphingomyelin and their adducts and fragments are based on the following atomic isotope masses:
1H = 1.0078250321 12C = 12.000000 14N = 14.0030740052 16O = 15.9949146221 23Na = 22.98976967 31P = 30.97376151
These masses are the most recent suggested isotopic masses from the National Institute of Standards and Technology (NIST) at:
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These masses represent the fragments that are formed from the Long-Chain Base (LCB) portion of the most common Sphingomyelin (SM) and Dihydrosphingomyelin (DSM) molecular species. The Long-Chain Base is combined with a Fatty Amide (FA) chain to form the Ceramide (or Dihydroceramide) backbone of sphingolipids. When a Phosphocholine Head Group is added the Ceramide or Dihydroceramide backbone, the molecules Sphingomyelin or Dihydrosphingomyelin are formed. The structures of the Long-Chain Base, Fatty Amide, Ceramide or Dihydroceramide, and Sphingomyelin or Dihydrosphingomyelin can be seen in the structure schemes listed on the Navigation Menu. |
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Monoisotopic Masses of Long-Chain Base Fragments |
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CN:d.b. |
[LCB]+ |
[LCB - H2O]+ |
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CN:d.b. |
[LCB]+ |
[LCB - H2O]+ |
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13:0 |
214.22 |
196.21 |
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20:0 |
312.33 |
294.32 |
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13:1 |
212.20 |
194.19 |
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20:1 |
310.31 |
292.30 |
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13:2 |
210.19 |
192.18 |
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20:2 |
308.30 |
290.28 |
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14:0 |
228.23 |
210.22 |
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21:0 |
326.34 |
308.33 |
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14:1 |
226.22 |
208.21 |
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21:1 |
324.33 |
306.32 |
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14:2 |
224.20 |
206.19 |
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21:2 |
322.31 |
304.30 |
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15:0 |
242.25 |
224.24 |
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22:0 |
340.36 |
322.35 |
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15:1 |
240.23 |
222.22 |
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22:1 |
338.34 |
320.33 |
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15:2 |
238.22 |
220.21 |
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22:2 |
336.33 |
318.32 |
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16:0 |
256.26 |
238.25 |
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23:0 |
354.37 |
336.36 |
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16:1 |
254.25 |
236.24 |
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23:1 |
352.36 |
334.35 |
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16:2 |
252.23 |
234.22 |
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23:2 |
350.34 |
332.33 |
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17:0 |
270.28 |
252.27 |
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24:0 |
368.39 |
350.38 |
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17:1 |
268.26 |
250.25 |
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24:1 |
366.37 |
348.36 |
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17:2 |
266.25 |
248.24 |
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24:2 |
364.36 |
346.35 |
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18:0 |
284.30 |
266.28 |
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25:0 |
382.40 |
364.39 |
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18:1 |
282.28 |
264.27 |
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25:1 |
380.39 |
362.38 |
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18:2 |
280.26 |
262.25 |
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25:2 |
378.37 |
360.36 |
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19:0 |
298.31 |
280.30 |
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26:0 |
396.42 |
378.41 |
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19:1 |
296.30 |
278.28 |
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26:1 |
394.40 |
376.39 |
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19:2 |
294.28 |
276.27 |
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26:2 |
392.39 |
374.38 |