Multiple choice

What is the marker enzyme of Golgi apparatus?

  1. Hexokinase

  2. Galactosyl transferase

  3. Pyruvate kinase

  4. Cytochrome oxidase
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B Correct answer
Explanation

Galactosyl transferase (GT) belongs to the glycosyl transferases. In several tissues and cell lines, the enzyme is localised by immunocytochemistry to the two to three trans cisternae of the Golgi complex and thus, may be considered as a specific membrane component of this type of endomembrane. As a consequence, it is the most common Golgi "marker" enzyme in cell fractionation studies.

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