Table 2.

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 C4Gln C3Glu C4Glu C3
mean10.43.42.92.1
SD2.40.90.90.9