The distributions of the eigenvalues λ 1 , λ 2 , λ 3 were also computed for the three experiments and used as a complementary criterion. This analysis yielded the values λ 1 = -0.22 ± 0. ). α-G6P, β-G6P and lactone intensities are depicted in blue, red and yellow, respectively. The time axis starts at 0 s, which corresponds to the first point of the kinetics analysis after waiting for the end of filling the NMR tube.