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Fig. 2. Glutathione redox chemistry in Z. viviparus liver samples after 2 h of exposure to 18°, 22° and 26°C and after 24 h recovery (recov.) from these temperatures. (A) Oxidized glutathione (GSSG) content. (B) Redox potential {Delta}E at in situ temperature and in situ intracellular pH (adopted from Sartoris et al., 2003; Larsen et al., 1997), calculated after Schaffer and Buettner (2001). Values are means ± s.d., N=4-7; *significantly different from the unstressed group, {dagger}significantly different from the respective recovery group, P<0.05.