Table 5.

Isotopomer distribution of GSH in RBCs incubated with [¹³C_1,2,3,4] α-ketoglutarate, alanine, and glucose

Time (h)	Percent Mass isotopomer distribution (GSH)a
	Monoisotopic	M + 1	M + 2	M + 3	M + 4
0	85.6 ± 2.5	11.4 ± 2.9	1.47 ± 0.86*	1.59 ± 0.81	0
6	86.6 ± 1.1	7.99 ± 0.19*	1.67 ± 0.45*	0.33 ± 0.33	3.42 ± 0.33**
12	80.9 ± 0.8	8.08 ± 0.60	2.11 ± 0.34*	0.80 ± 0.42	8.09 ± 0.15**
21.25	78.4 ± 0.9*	7.96 ± 0.67	1.03 ± 0.52*	1.38 ± 0.18*	11.3 ± 1.2*
Expected distribution due to natural abundance	82.93	10.90	5.43	0.62	0.10

^aMeans and S.E.M. for n = 3

* p < 0.05; ** p < 0.001