Comparison of read length distributions for transcriptome sequences of one tame and one agressive fox. Reads were generated from cDNA from prefrontal cortex using the Roche 454 FLX Titanium platform. Data represents a total of 6 runs comprising 5 half full runs for one tame individual (green) and 6 half full runs for one aggressive fox (red). Reads were quality filtered with standard parameters and cleaned of adaptor sequences. For statistics of reads see table 1.