Results 211 to 220 of about 128,949 (267)
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Glycogen synthetase and phosphorylase in developing chick glycogen body
Journal of Experimental Zoology, 1974AbstractGlycogen synthetase and phosphorylase activities were quantitatively determined for the first time in glycogen body tissue from late embryonic and neonatal chicks. For comparative purposes, these enzyme activities were examined also in skeletal muscle and liver from pre‐ and post‐hatched chicks.
Camillo A. Benzo +3 more
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The Structure and the Regulation of Glycogen Phosphorylases in Brain
2019Glycogen constitutes the main store of glucose in animal cells. Being present at much lower concentrations in the brain than in liver and muscles, brain glycogen has long been considered as an emergency source of glucose, mobilized under stress conditions (including hypoglyceamia).
Mathieu, Cecile +2 more
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In vivo synthesis of glycogen by phosphorylase system
Histochemistry, 1980Application of conventional histochemical techniques to the living chick retina demonstrates that phosphorylase can synthesize glycogen (polyglucose) in vivo, in the paraboloid of the accessory cone. Natural in vivo glycogen synthesis may therefore be due to glycogen synthetase and phosphorylase systems, although phosphorylase is normally regarded as a
Hiroaki Yoshida, T. Ameniya
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1986
Publisher Summary This chapter reviews the knowledge of the enzymic characteristics of phosphorylase and its regulation. The regulation of this enzyme by phosphorylation is superimposed on the evolutionary earlier control by feedback inhibition (glucose and glucose 6-phosphate) and by the cell's energy charge (inhibition by ATP; activation by AMP and
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Publisher Summary This chapter reviews the knowledge of the enzymic characteristics of phosphorylase and its regulation. The regulation of this enzyme by phosphorylation is superimposed on the evolutionary earlier control by feedback inhibition (glucose and glucose 6-phosphate) and by the cell's energy charge (inhibition by ATP; activation by AMP and
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Radioactive method for the assay of glycogen phosphorylases
Analytical Biochemistry, 1972Abstract A new assay for glycogen phosphorylase (EC 2.4.1.1) is presented. This assay employs a filter paper technique in which newly formed glycogen-14C is precipitated on paper squares using 66% ethanol while other radioactivity is removed by washing.
Frank Q. Nuttall +2 more
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Glycogen-bound phosphorylase in Cryptococcus laurentii
Biochimica et Biophysica Acta (BBA) - General Subjects, 1970Abstract Electron micrographs of Cryptococcus laurentii cells reveal glycogen granules throughout the cytoplasm. Glycogen phosphorylase (α-1,4-glucan: orthophosphate glucosyltransferase, EC 2.4.1.1) is bound to these granules and has been obtained in purified form upon isolation of homogeneous preparations of these granules.
John C. Schultz, Helmut Ankel
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Studies on glycogen phosphorylase
1962PART I GLYCOGEN PHOSPHORYLASE IN BRAIN, ILEUM AND UTERUS In recent years considerable attention has been devoted to the nature of the glycogen phosphorylase enzyme system in skeletal muscle, cardiac muscle and liver. It has been established that those factors which affect the action of this enzyme constitute a major metabolic control mechanism ...
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The Family of Glycogen Phosphorylases: Structure and Functio
Critical Reviews in Biochemistry and Molecular Biology, 1989Glycogen phosphorylase plays a central role in the mobilization of carbohydrate reserves in a wide variety of organisms and tissues. While rabbit muscle phosphorylase remains the most studied and best characterized of phosphorylases, recombinant DNA techniques have led to the recent appearance of primary sequence data for a wide variety of ...
Christopher B. Newgard +2 more
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Glycogen phosphorylase BB in myocardial infarction
Clinica Chimica Acta, 2015Early experimental and clinical reports on glycogen phosphorylase BB (GPBB) kinetics following myocardial ischemic injury suggested that it could be a useful diagnostic marker for early detection of acute myocardial infarction (AMI). After more than two decades of investigation, there is now overwhelming body of evidence that do not support the use of ...
Jelena Stepanovic +6 more
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Phosphorylase and Related Enzymes of Glycogen Metabolism
1964Publisher Summary The finding that pyridoxal phosphate is an essential constituent or coenzyme of glycogen phosphorylase created a new dimension for thought concerning the functions of vitamin B6. This chapter explores questions, such as “Did the discovery of vitamin B6 in phosphorylase stimulate avenues of approach that have led to new disclosures ...
Edwin G. Krebs, Edmond H. Fischer
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