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Fig. 2 | Genes and Environment

Fig. 2

From: Negative and positive control ranges in the bacterial reverse mutation test: JEMS/BMS collaborative study

Fig. 2

Negative control counts, and their subsequent analysis, for Salmonella Typhimurium strain TA98 with and without S9 mix. Scatter plots showing the negative control counts generated by each participating laboratory without (c) and with (d) S9 mix are also shown, where the inner horizontal lines (−˙-) indicate the mean ± 2× standard deviation (SD), and outer horizontal lines (−--) indicate the mean ± 3× SD. The data shown in panels (a) to (d) are taken from the study conducted in 2016. The mean ± 2× SD values for the negative control counts for each individual year without (e) and with (f) S9 mix are also presented

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