Expression of angiotensin converting enzyme (ACE; A) and transforming growth factor β (TGF-β; B) in lung tissue of hibernating hamsters. Expression of angiotensin converting enzyme (ACE; A) and transforming growth factor β (TGF-β; B) in lung tissue of hibernating hamsters. Protein expressions were normalized to that of β-actin. The insets show representative western blots for ACE, TGF-β and β-actin. TE, torpor early; TL, torpor late; AE, arousal early; AL, arousal late; EU, euthermia. Values are means ± s.e.m. *Significantly different from euthermia, P<0.05, N≥3 per group. Fatemeh Talaei et al. J Exp Biol 2011;214:1276-1282 © 2011.