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Going with the flow or life in the fast lane: contrasting mitochondrial responses to thermal change

Helga Guderley^1,* and Julie St-Pierre²

¹ Département de Biologie, Université Laval, Québec, P.Q., Canada G1T 2M7, UK
² MRC Dunn Human Nutrition Unit, Hills Road, Cambridge CB2 2XY, UK

View larger version (15K): [in a new window]   Fig. 1. Maximum rates of oxygen uptake by isolated mitochondria from trout oxidative muscle respiring at habitat temperatures. Values from Feb 94, Dec 94 and Feb 96 did not differ but were lower than those for the other times (ANOVA, a posteriori comparisons, P<0.05). Data from Guderley and St-Pierre (1999). Values are means ± S.E.M., N=9.

View larger version (12K): [in a new window]   Fig. 2. Cycles in ADP affinity (Km) of mitochondria isolated from trout oxidative muscle after seasonal acclimatisation. Data from Guderley and St-Pierre (1999). Values are means ± S.E.M., N=5-9.