Table 1. The distribution of isotopomers of metabolite A (shown in Fig 2) within tandemers of A, defined with respect to $A_{\left\{\mathrm{2,3}\right\}}^{\left\{\mathrm{2,3},4\right\}}$.

Isotopomers	Tandemers
0000	[M + 0] > [m + 0]
0001	[M + 1] > [m + 0]
0010	[M + 1] > [m + 1]
0011	[M + 2] > [m + 1]
0100	[M + 1] > [m + 1]
0101	[M + 2] > [m + 1]
0110	[M + 2] > [m + 2]
0111	[M + 3] > [m + 2]
1000	[M + 0] > [m + 0]
1001	[M + 1] > [m + 0]
1010	[M + 1] > [m + 1]
1011	[M + 2] > [m + 1]
1100	[M + 1] > [m + 1]
1101	[M + 2] > [m + 1]
1110	[M + 2] > [m + 2]
1111	[M + 3] > [m + 2]

Isotopomers are represented by sequences of zeroes and ones, denoting non-labeled and labeled atoms, respectively.