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. 2011 Dec 15;214(24):4193–4200. doi: 10.1242/jeb.063644

Fig. 4.

Fig. 4.

Rest- and voluntary submersion-associated apneas activate the adaptive response to oxidative stress in elephant seal pups. Mean (±s.e.m.) muscle protein expression of (A) superoxide dismutase 1 (Cu,ZnSOD) and (B) catalase before (eupnea) and after repetitive apneas in elephant seal pups. (C) NF-E2-related factor 2 (Nrf2) nuclear content before (eupnea) and after repetitive apneas in elephant seal pups. (D) Representative western blot analyses of Nrf2, Cu,ZnSOD and catalase protein expression in northern elephant seal pups. *Significant (P<0.05) difference from eupnea.