EM-induced genes with similar expression changes across tissues. Data are log-ER (Expression Ratio). Microarray analyses were conducted on individual liver samples (the group means are shown, n = 6; underlined values mean significantly different groups, p < 0.05) and in pooled samples (n = 6 per tissue) of liver, gill, heart and spleen (the average values of two slides are shown). Up- and down-regulated genes are highlighted with orange and green scales, as shown below the figure. NS means not significant (p < 0.01, t-test, 6 spot replicates per gene).