Table 2.

Isotopomer distribution of alanine in RBCs incubated with [U–¹³C] glucose

Time (h)	Percent mass isotopomer distribution (alanine)a
	Monoisotopic	M + 1	M + 2	M + 3	M + 4
0	95.6 ± 0.4	2.43 ± 0.63	n.d.b	1.94 ± 0.51	0
12	60.6 ± 1.1**	4.04 ± 0.04*	n.d.b	35.4 ± 1.1**	0
Expected distribution due to natural abundance	95.92	3.62	0.44	0.01	0

^aMeans and S.E.M. for n = 3

^bn.d. = not determined

* p < 0.05; ** p < 0.001