muscle biopsy samples were obtained from healthy subjects in order to evaluate quantitative differences in single fibres of substrate ( glycogen and triglyceride ) and ion concentrations ( na+ and k+ ) as well as enzyme activity levels ( succinate-dehydrogenase , sdh ; phosphofructokinase , pfk ; 3-hydroxyacyl-coa-dehydrogenase , had ; myosin atpase ) between human skeletal muscle fibre types .
C0038615
succinate-dehydrogenase
C0283592
sdh