Fraction
Found in PeakData
The corrected abundance of the labeled element in this PeakData as a fraction of the total abundance of this isotopomer in this PeakGroup. Accucor calculates this as "Normalized", but TraceBase renames it to "fraction" to avoid confusion with other variables like "normalized labeling".
fraction = peak_corrected_abundance / peak_group_total_abundance
Example: alanine (C3H7NO2) measured with 13C and 15N labeling:
| Labeled Element:Count | Corrected Abundance | Fraction |
|---|---|---|
| C:0; N:0 | 1090437 | 0.633529 |
| C:0; N:1 | 154827.9 | 0.089953 |
| C:1; N:0 | 0 | 0 |
| C:1; N:1 | 0 | 0 |
| C:2; N:0 | 3105.043 | 0.001804 |
| C:2; N:1 | 0 | 0 |
| C:3; N:0 | 33989.78 | 0.019748 |
| C:3; N:1 | 438849.7 | 0.254966 |