Figure 2From: Ageing of enteric neurons: oxidative stress, neurotrophic factors and antioxidant enzymesDensitometric analysis of (a) GDNF (b) NTN (c) c-ret (c) and (d) GFR α-1 RT-PCR gels standardised against β-actin expression. Levels are in arbitrary units, bars show standard errors. * p ≤ 0.05.Back to article page