<p><b>Copyright information:</b></p><p>Taken from "A SAGE-based screen for genes expressed in sub-populations of neurons in the mouse dorsal root ganglion"</p><p>http://www.biomedcentral.com/1471-2202/8/97</p><p>BMC Neuroscience 2007;8():97-97.</p><p>Published online 19 Nov 2007</p><p>PMCID:PMC2241628.</p><p></p> TrkA and Ube2e3 (ubiquitin-conjugating enzyme E2E 3) were used as controls. Data (means ± SEM) were calculated by the delta-CT method [37] on three independent experimental replicates. The arithmetic means of the expression levels of two genes (Polr2j, Ddx48) whose expression do not change in the course of development and in TrkA-/- DRG were used to normalize the expression levels. Data were analyzed using the Mann Whitney U-test (*P < 0.05). ND: Not detected