Glucose 1,6-bisphosphate and fructose 2,6-bisphosphate levels in different types of rat skeletal muscle.
1. The concentration of glycogen, glucose 1,6-P2, fructose 2,6-P2 and the content of glycogen phosphorylase, phosphofructokinase, 6-phosphofructo 2-kinase and glucose 1,6-P2 phosphatase activity, have been determined in rat muscles which differ in their fiber composition: extensor digitorum longus, gastrocnemius, diaphragm and soleus. 2. Glucose 1,6-P2 concentration seems to be related to the glycolytic capacity of the muscle, while fructose 2,6-P2 concentration does not. 3. No significant relationship exists between the fiber type and the content in glucose 1,6-P2 phosphatase and 6-phosphofructo 2-kinase activities.
Bassols
A M
AM
Departamento de Bioquimica, Facultad de Medicina, Universidad de Barcelona, Zona Universitaria de Pedralbes, Spain.
Cussó
R
R
Carreras
J
J
D000818:Animals; D005635:Fructosediphosphates / Q000032:analysis*; D019298:Glucose-6-Phosphate / Q000031:analogs & derivatives*; D005958:Glucosephosphates / Q000032:analysis*; D006003:Glycogen / Q000032:analysis; D006598:Hexosediphosphates / Q000032:analysis*; D008297:Male; D009132:Muscles / Q000032:analysis* / Q000201:enzymology; D009928:Organ Specificity; D010732:Phosphofructokinase-1 / Q000378:metabolism; D010733:Phosphoglucomutase / Q000378:metabolism; D010744:Phosphoric Monoester Hydrolases / Q000378:metabolism; D006005:Phosphorylases / Q000378:metabolism; D051381:Rats; D011919:Rats, Inbred Strains
D005635:Fructosediphosphates; D005958:Glucosephosphates; D006598:Hexosediphosphates; D019298:Glucose-6-Phosphate; C027652:fructose 2,6-diphosphate; D006003:Glycogen; C016473:glucose-1,6-bisphosphate; D006005:Phosphorylases; D010732:Phosphofructokinase-1; C014818:glucose 1,6-diphosphate phosphatase; D010744:Phosphoric Monoester Hydrolases; D010733:Phosphoglucomutase