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Arginine, Glutamate, and Proline as Substrates for Oxidation and for Glycogenesis in Cephalopod Tissues
|Title:||Arginine, Glutamate, and Proline as Substrates for Oxidation and for Glycogenesis in Cephalopod Tissues|
|Issue Date:||Jul 1982|
|Publisher:||University of Hawai'i Press|
|Citation:||Hochachka PW, Fields JHA. 1982. Arginine, glutamate, and proline as substrates for oxidation and for glycogenesis in cephalopod tissues. Pac Sci 36(3): 325-335.|
|Abstract:||In addition to the usual metabolic roles for arginine and proline in
cephalopod metabolism (the first serving in anaerobic metabolism and the
second in augmenting the Krebs cycle pool of intermediates), we found that
arginine and proline were vigorously oxidized and that their catabolism appeared
to proceed through two common intermediates, glutamate and ornithine.
In addition, we found that glutamate and proline were both capable of supplying
precursors for the gluconeogenic pathway. On a unit mass basis, highest rates of
14C-glutamate and 14C-proline incorporation into glycogen occurred in the
kidney, but when overall organ and tissue mass were considered, muscle, kidney,
and gill displayed comparable rates of glycogen formation from these amino
acids. The possibility was considered that these interactions between arginine,
proline, and glycogen metabolism may be utilized during replenishment of all
three substrate stores during recovery from exhaustive exercise.
|Appears in Collections:||Pacific Science Volume 36, Number 3, 1982|
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