The Developmental Pattern of Enzymes Related to Glycogen Metabolism in Chick Embryo Muscle

Piras, Marta M.; Staneloni, Roberto J.; Hernández, M.N.; Leiderman, B; Piras, Romano

doi:10.1016/b978-0-12-557250-7.50043-x

Cited by 2 publications

(3 citation statements)

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“…1) (47). A common feature observed for these three enzymes is that the relative proportion of each phosphorylated form decreases until day 17-22 of incubation (31), suggesting that the de novo synthesis occurring during this period 'dilutes' the relatively high proportion of phosphorylated forms present at the early stages of development.…”

Section: Skeletal Musclementioning

confidence: 96%

“…On the other hand, GS and/or Ph are probably under some kind of regulation (by metabolites?) since the glycogen accumulation which occurs at these stages cannot be explained on the basis of the relative activities of these two enzymes or the concentration of their substrates (31).…”

Section: Discussionmentioning

confidence: 99%

“…The procedures employed for tissue isolation, sampling, preparation of homogenates and enzymatic assays have been described (30)(31)(32). PDE assays were carried out for 10 min at 30 °C on 8,000 g supernatant fluids of muscles homogenized with four volumes of 40 mM sodium glycerophosphate, pH 6.8, 40 mM NaF, 20 mM mercaptoethanol and 10 mM EDTA.…”

Section: Methodsmentioning

confidence: 99%

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The Developmental Formation of Enzymes Involved in Glycogen Metabolism

Piras¹,

Piras²

1973

Enzyme Protein

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The developmental pattern of enzymes related to glycogen metabolism for embryonic chick muscle is described. The results reported indicate that most, but not all of the enzymes appear as a cluster approximately 1 week before birth. In addition, it is shown that protein kinase has a changing isozymic pattern during development and that epinephrine-promoted glycogenolysis occurs only a few days before hatching. The results are discussed in connection with the apparent lack of temporal coordination in the development of all the enzymes involved in glycogen metabolism, as well as in terms of the appearance of the control mechanisms which operate in adult tissues. A comparison of developmental aspects of glycogen metabolism in other tissues and species is also given.

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Section: Skeletal Musclementioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%