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. Author manuscript; available in PMC: 2014 Sep 8.
Published in final edited form as: Eur J Nucl Med Mol Imaging. 2008 Jul 26;35(12):2275–2285. doi: 10.1007/s00259-008-0870-6

Fig. 3.

Fig. 3

293T CMV-Luc cells were exposed for 15 min with 14C-D-luciferin, followed by cell uptake measurements for 14C-derived radioactivity. The cell uptake of 14C-D-luciferin is 1.6 fold higher (p=0.04) in the presence of mass amounts of unlabeled D-luciferin during the uptake period. Sample 1: 293T-CMV-Luc cells, +14C-D-luciferin. Sample 2: 293T-CMV-Luc cells, +14C- D-luciferin+mass amounts of carrier D-luciferin. Sample 3: No radioactivity added (background control with 293T-CMV-Luc cells)