Allosteric Enzyme

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Allosteric Enzyme is an enzyme which exists in two different forms. Both these forms have different effects on the catalytic activity of an enzyme as they have different biological activity. One form can be readily interconverted into the other, and this process is regulated by an allosteric effector. In one form the allosteric enzyme would result in the enzyme having a high affinity for its substrate; where as in the other it would cause the enzyme to have a low affinity for its substrate[1].

An example of an allosteric enzyme is glycogen phosphorylase.


  1. Hardin, J., Kleinsmith, L., Bertoni, G., 2012. Becker's world of the cell, 8th Edition, Boston: Benjamin Cummings. [pp.147]

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