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Fig. 1 | BMC Cancer

Fig. 1

From: Distinct nitrogen isotopic compositions of healthy and cancerous tissue in mice brain and head&neck micro-biopsies

Fig. 1

δ15N difference of all cell dilutions of MCF7 and HeLa cells relative to the samples with 40,000 cells. Two to six samples per dilution were measured. Error bars indicate standard deviations calculated from 2 to 6 replicates. Green dotted lines indicate ±0.2‰ differences from the average of the analyses of 40,000-cell samples. Average δ15N for all MCF7 samples measured is − 1.55‰ ± 0.11‰ vs. air (1 s.d.; n = 18), and average δ15N for HeLa is − 1.46‰ ± 0.11‰ vs. air (1 s.d.; n = 20)

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