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. 2013 Apr 30;41(12):e126. doi: 10.1093/nar/gkt344

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© The Author(s) 2013. Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 4. — Isotope imaging of A549 cells transfected with unlabeled (A–D) or ¹⁸O-labeled control siRNA (E–H). Distribution of (A and E) ¹²C¹⁴N, (B and F) ¹⁶O and (C and G) ¹⁸O. (D and H) ¹⁸O/¹⁶O isotopographs. The isotopic abundance of ¹⁸O is indicated by the color scale.