Wm. Craig Byrdwell, phd

Resources for Lipid Analysis in the 21st Century

Text Box: For a conveniently printable .pdf version of this mass list, click HERE

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

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:

 

Physics.NIST.gov/

PhysRefData/Compositions/

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.

Monoisotopic Masses of Long-Chain Base Fragments

CN:d.b.

[LCB]+

[LCB - H2O]+

 

CN:d.b.

[LCB]+

[LCB - H2O]+

13:0

214.22

196.21

 

20:0

312.33

294.32

13:1

212.20

194.19

 

20:1

310.31

292.30

13:2

210.19

192.18

 

20:2

308.30

290.28

14:0

228.23

210.22

 

21:0

326.34

308.33

14:1

226.22

208.21

 

21:1

324.33

306.32

14:2

224.20

206.19

 

21:2

322.31

304.30

15:0

242.25

224.24

 

22:0

340.36

322.35

15:1

240.23

222.22

 

22:1

338.34

320.33

15:2

238.22

220.21

 

22:2

336.33

318.32

16:0

256.26

238.25

 

23:0

354.37

336.36

16:1

254.25

236.24

 

23:1

352.36

334.35

16:2

252.23

234.22

 

23:2

350.34

332.33

17:0

270.28

252.27

 

24:0

368.39

350.38

17:1

268.26

250.25

 

24:1

366.37

348.36

17:2

266.25

248.24

 

24:2

364.36

346.35

18:0

284.30

266.28

 

25:0

382.40

364.39

18:1

282.28

264.27

 

25:1

380.39

362.38

18:2

280.26

262.25

 

25:2

378.37

360.36

19:0

298.31

280.30

 

26:0

396.42

378.41

19:1

296.30

278.28

 

26:1

394.40

376.39

19:2

294.28

276.27

 

26:2

392.39

374.38