Total neuronatin protein contents (Nnat-α and Nnat-β) at different time points after axotomy of sciatic nerve in adult rats. (A) The total neuronatin protein contents from DRGs of control and post-axotomy day 1, 3, 5, and 7 were subjected to Western blot analysis. (B) The total neuronatin protein expression levels. Individual band was quantitated, and normalized with the density of its own GAPDH. Value are presented as mean ± S.E.M. (* P < 0.05 compared with control rats, n = 9 for each group).