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The posttranslational modification involving nitric oxide is called __________________

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The posttranslational modification involving nitric oxide is called __________________

(a) N-nitrosylation

(b) P-nitrosylation

(c) N-glycosylation

(d) S-nitrosylation

The question was posed to me in homework.

My query is from Cell Signaling and Signal Transduction topic in portion Cell Signaling and Signal Transduction of Cell Biology

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The correct answer is (d) S-nitrosylation

Explanation: The posttranslational modification wherein nitric oxide (NO) is covalently added to the thiol group of a protein cysteine residue (S-NO) is called S-nitrosylation.  This modification alters the activity and interactions of the protein.

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