to assess whether hepatic glycogen is actively turning over under conditions which promote net glycogen synthesis we perfused livers from 24-h fasted rats with 20 mm d- [ 1-13c ] glucose , 10 mm l- [ 3-13c ] alanine , 10 mm l- [ 3-13c ] lactate , and 1 microm insulin for 90 min followed by a 75-min `` '' chase '' '' period with perfusate of the same composition containing either 13c-enriched or unlabeled substrates .
C0023902
hepatic glycogen
C0017911
glycogen