Fig. 3From: Fish biomarkers from a different perspective: evidence of adaptive strategy of Abramis brama (L.) to chemical stressGene expression in liver or brain (only neurotoxicity) of the two populations of A. brama. Gene expression was determined by RQ-PCR analysis. Columns represent mean values ± SD, with N = 14 (reference population) and N = 11 (exposed population). Asterisks annotate statistically significant difference between populations, as determined by parametric t-test (for nrf2a, cyp1a, pc, mbp) or Mann–Whitney U test (for hsp70, cr, erk2a, cox1, sod, gpx1, mgst3a, erα, erβ, pygl, tfd), depending on the normality of distribution of data. Levels of significance were *p < 0.05, **p < 0.01, and ***p < 0.001. Median values, interquartile ranges, minimum and maximum are given in Additional file 1: Table S5Back to article page