Accession Number : ADA131077

Title :   Brain and Liver Glutamine Synthetase of Rana catesbeiana and Rana cancrivora.

Descriptive Note : Final rept.,

Corporate Author : AIR FORCE ACADEMY CO

Personal Author(s) : Webb,James T

PDF Url : ADA131077

Report Date : Jul 1983

Pagination or Media Count : 15

Abstract : Enzyme assays using the gamma-glutamyl transferase method provided estimates of glutamine synthetase activity in brain and liver tissues of Rana catesbeiana and Rana cancrivora. Glutamine synthetase specific activity in liver and brain tissues were not significantly different between these species. In the salt-eater frog R. cancrivora, liver glutamine synthetase activity is insufficient to produce enough glutamine to supply the urea cycle with a nitrogen source. The pathway involving glutamine as a nitrogen source for urea production in marine chondrichthian fishes is not valid in the marine amphibian, Rana cancrivora.

Descriptors :   *Enzymes, *Glutamine, *Brain, *Liver, *Frogs, Bioassay, Transferases, Tissues(Biology), Urea, Biosynthesis, Assimilation, Osmosis

Subject Categories : Biochemistry
      Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE