In addition to allosteric inhibition, glutamine synthetase is regulated by covalent modification. Which of the following is true of the covalent regulation? A. Adenylylation of the regulatory protein PII activates glutamine synthetase. B. Uridylylation of PII leads to activation of glutamine synthetase. C. ATP is necessary to deactivate glutamine synthetase. D. Alpha-ketoglutarate stimulates glutamine synthetase activation. E. B, C, and D but not A.
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Sri K.
Which statement about glutamine synthetase is INCORRECT? A. Covalent modification by phosphorylation sensitizes it to allosteric inhibitors B. It consists of multiple identical subunits C. It is present in most, if not all, organisms D. Its product, glutamine, is a common source of amino groups in the synthesis of some biomolecules
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