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... > Enzymes and Coenzymes > Enzymes > Transferases > Glycosyltransferases > Hexosyltransferases > Glucosyltransferases > Phosphorylases > Glycogen Phosphorylase

Preferred term

Glycogen Phosphorylase  

Type

  • Topical Descriptor

Broader concept

Narrower concepts

Entry terms

  • Phosphorylase ab

Note

  • general or unspecified; prefer specifics

Scope note

  • An enzyme that catalyzes the degradation of GLYCOGEN in animals by releasing glucose-1-phosphate from the terminal alpha-1,4-glycosidic bond. This enzyme exists in two forms: an active phosphorylated form ( PHOSPHORYLASE A) and an inactive un-phosphorylated form (PHOSPHORYLASE B). Both a and b forms of phosphorylase exist as homodimers. In mammals, the major isozymes of glycogen phosphorylase are found in muscle, liver and brain tissue.

History note

  • 2002

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URI

http://www.yso.fi/onto/mesh/D024981

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