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James B. Walker

Bio: James B. Walker is an academic researcher from Texas Medical Center. The author has contributed to research in topics: Psychological repression & Arginine. The author has an hindex of 1, co-authored 1 publications receiving 14 citations.

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Journal ArticleDOI
TL;DR: Evidence is cited in support of the thesis that the creatine-transamidinase control system has survival value for birds, and perhaps reptiles and amphibians.

14 citations


Cited by
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Journal ArticleDOI
TL;DR: Dietary GAA supplementation of meat-type quail breeders increases the availability of creatine in eggs and muscle of progeny, which results in better reproductive parameters and better postnatal progeny performance.

29 citations

Journal ArticleDOI
TL;DR: The rate of creatine synthesis is influenced by the rate of penetration of arginine into the mitochondria, because of transamidinase compartmentation.
Abstract: Arginases have been found to be located on the external side of the inner mitochondrial membrane of chicken kidney and liver. Transamidinase has been detected within the liver mitochondrial matrix space. Arginases and transamidinase act upon two different intracellular arginine pools. Penetration of arginine into the matrix space occurs only in respiring mitochondria and in the presence of anions such as acetate and phosphate; d-arginine, l-ornithine, d-ornithine and l-lysine penetrate with the same modalities. l-Histidine penetrates only kidney mitochondria. Because of transamidinase compartmentation, the rate of creatine synthesis is influenced by the rate of penetration of arginine into the mitochondria.

29 citations