Fig. 2. Activities of glycolytic, mitochondrial and biosynthetic enzymes in white muscle, sampled at three sites along the length of the body (behind the head, in the middle of the body and at the caudal peduncle) in starved and fed cod. Values are means ± S.E.M. Letters indicate statistical differences among the sampling positions in each treatment (starved and fed); two columns with the same letter do not differ (a posteriori comparisons, P<0.05). PFK, phosphofructokinase; PK, pyruvate kinase; CK, creatine kinase; LDH, lactate dehydrogenase; CCO, cytochrome c oxidase; CS, citrate synthase; NDPK, nucleoside diphosphate kinase.