Fractional enrichments (over natural abundance) of neuronal glutamate and glutamine C4 and C3 in gray matter measured at steady state during the [2-13C] acetate infusion (n= 8; mean ± SD)
| Gln C4 | Gln C3 | Glu C4 | Glu C3 | |
|---|---|---|---|---|
| mean | 10.4 | 3.4 | 2.9 | 2.1 |
| SD | 2.4 | 0.9 | 0.9 | 0.9 |