Additional file 2.

Comparison of the gene expression differences between qPCR using primers designed against chicken and against penguin transcript sequences. Expression fold changes of the six genes tested by quantitative PCR using primers designed against chicken (black bars) vs. penguin sequences (gray bars). These fold changes correspond to SA/NI for the genes up-regulated during the transition from terrestrial to marine life (represented above the x-axis) and to NI/SA for the down-regulated genes (represented below the x-axis).

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Degletagne et al. BMC Genomics 2010 11:344   doi:10.1186/1471-2164-11-344