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Table 4 Tandem-mass spectrometry (MS) analysis of selected 28-carbon containing masses

From: Reduced levels of hydroxylated, polyunsaturated ultra long-chain fatty acids in the serum of colorectal cancer patients: implications for early screening and detection

Marker nominal neutral mass

446

448

450

464

466

468

[M-H]-(%)

445 (100%)

447 (52%)

449 (92%)

463 (70%)

465 (100%)

467 (100%)

Chain cut ions (%)

223 (18%)

277 (11%)

171 (7%)

277 (10%)

241 (7%)

187 (12%)

  

222 (11%)

239 (5%)

127 (9%)

241 (68%)

223 (3%)

169 (3%)

  

207 (3%)

207 (3%)

125 (12%)

223 (15%)

215 (2%)

141 (2%)

  

205 (11%)

169 (6%)

113 (38%)

185 (8%)

185 (4%)

113 (4%)

  

113 (5%)

113 (25%)

 

167 (4%)

167 (4%)

 
     

113 (28%)

113 (7%)

 

Peripheral cut ions (%)

Loss of H 2 O

427 (50%)

429 (35%)

431 (80%)

445 (46%)

447 (45%)

449 (84%)

 

Loss of 2H 2 O

409 (8%)

411 (6%)

413 (13%)

427 (6%)

429 (8%)

431 (10%)

 

Loss of CO 2

401 (95%)

403 (100%)

405 (100%)

419 (100%)

421 (45%)

423 (25%)

 

Loss of CO 2 and H 2 O

383 (28%)

385 (15%)

387 (32%)

401 (24%)

403 (20%)

405 (13%)

 

*Loss of CO 2 and 2H 2 O

365

367

369

383 (2%)

385 (4%)

387 (3%)

 

*Loss of 3H 2 O

   

409

411

413

Secondary daughter ions (%)

357 (5%)

331 (3%)

307 (5%)

347 (5%)

349 (4%)

349 (1%)

  

329 (11%)

305 (3%)

291 (7%)

319 (5%)

321 (2%)

323 (2%)

  

261 (3%)

359 (2%)

295 (5%)

295 (6%)

297 (3%)

309 (2%)

  

241 (3%)

289 (3%)

281 (5%)

281 (5%)

281 (3%)

297 (6%)

  

233 (5%)

245 (3%)

279 (9%)

279 (5%)

279 (15%)

281 (3%)

  

207 (11%)

125 (6%)

263 (7%)

267 (5%)

261 (3%)

279 (5%)

  

177 (11%)

123 (3%)

261 (5%)

249 (6%)

251 (3%)

269 (5%)

  

123 (5%)

121 (3%)

169 (5%)

195 (10%)

195 (2%)

263 (8%)

  

109 (11%)

111 (5%)

111 (5%)

141 (1%)

141 (2%)

251 (4%)

  

97 (16%)

97 (5%)

97 (8%)

127 (9%)

123 (4%)

243 (2%)

  

83 (11%)

59 (3%)

83 (5%)

121 (6%)

113 (5%)

215 (4%)

  

59 (11%)

 

59 (1%)

101 (6%)

101 (3%)

213 (3%)

     

97 (4%)

97 (32%)

197 (3%)

     

83 (2%)

83 (2%)

125 (4%)

     

59 (2%)

59 (2%)

111 (3%)

       

98 (2%)

       

57 (1%)

  1. *Ions m ay have been obtained from MS3 experiments