Correction to: Nature Communications https://doi.org/10.1038/s41467-017-01143-w, published online: 06 Oct 2017

The originally published version of this Article contained an error in Equation 30, which was inadvertently introduced during the production process. The incorrect form of Equation 30 was:

$$\frac{{V_{PC}}}{{V_{CS}}} = \left( {\left[ {\frac{{[3 - {}^{13}C]OAA}}{{[1 - {}^{13}C]OAA}} - 1} \right] \ast \frac{1}{{1 - 0.5 \ast K_3}} \ast \frac{1}{2}} \right)$$

The correct form of Equation 30 is:

$$\frac{{V_{PC}}}{{V_{CS}}} = \left[ {0.5 \ast \frac{{[3 - {}^{13}C]OAA}}{{[1 - {}^{13}C]OAA}} - 1} \right]\ast \frac{1}{{1 - 0.5 \ast K_3}}$$

This has now been corrected in the PDF and HTML versions of the Article.