Fig. 2From: Coping with extremes: lowered myocardial phosphofructokinase activities and glucose content but increased fatty acids content in highland Eurasian Tree SparrowsComparisons of maximal hexokinase (HK) activity (a) and citrate synthase (CS) activity (b) in the myocardium of Eurasian Tree Sparrows (Passer montanus) between sexes. The statistical results are shown in Table 1. The asterisk represents a significant difference (P < 0.05) between groupsBack to article page