Fig. 5. Relative expression of myogenin mRNA in white muscle of GH-transgenic and non-transgenic Atlantic salmon at 4 and 7 months of age. Sample size equals 11 for non-transgenic salmon at 4 months, 12 for transgenic salmon at 4 months, 9 for non-transgenic salmon at 7 months and 9 for transgenic salmon at 7 months. Results are means ± s.e.m. Different letters indicate significant differences. Myogenin data were log transformed to obtain normality. Two-way ANOVA was used, assessing the effect of age (P<0.001), presence of the transgene (P=0.528) and the interaction of age and the transgene (P=0.002). See Fig. 4 legend for the definition of relative expression. (B) Picture of the gel used to analyse band intensities.