Table 2.
List of Cer species and their m/z values detected by MALDI-MSI in segment 4 of Fig. 1D
| Cer species detected in segment 4 | |
|---|---|
| [M + H]+ | Cer species |
| 566.55 ± 0.4 | Cer d18:1/18:0 |
| 594.58 ± 0.4 | Cer d18:1/20:0 |
| 622.61 ± 0.4 | Cer d18:1/22:0 |
| 648.63 ± 0.4 | Cer d18:1/24:1 |
| 650.64 ± 0.4 | Cer d18:1/24:0 |
| 554.51 ± 0.4 | Cer d18:1/16:0-OH or Cer t18:1(6-OH)/16:0a |
| 582.55 ± 0.4 | Cer d18:1/18:0-OH or Cer t18:1(6-OH)/18:0a |
| 610.58 ± 0.4 | Cer d18:1/20:0-OH or Cer t18:1(6-OH)/20:0a |
| 638.61 ± 0.4 | Cer d18:1/22:0-OH or Cer t18:1(6-OH)/22:0a |
| 664.62 ± 0.4 | Cer d18:2/24:0-OHa |
| 666.64 ± 0.4 | Cer d18:1/24:0-OH or Cer t18:1(6-OH)/24:0a |
| 584.56 ± 0.4 | Cer d18:0/18:0-OH or Cer t18:0/18:0a |
| 612.59 ± 0.4 | Cer d18:0/20:0-OH or Cer t18:0/20:0a |
| 640.62 ± 0.4 | Cer d18:0/22:0-OH or Cer t18:0/22:0a |
| 668.66 ± 0.4 | Cer d18:0/24:0-OH or Cer t18:0/24:0a |
d18:0 long chain base: dihydrosphingosine; t18:1(6-OH) long chain base; 6-hydroxy sphingosine; t18:0 long chain base: phytosphingosine. Hydroxylation of fatty acyl chain may occur at α, β, or ω position.
a
Assignment by m/z value only.