The addition of nitric oxide to the sulfhydryl groups of certain cysteine residues in a number of proteins,including hemoglobin,Ras,ryanodine channels and caspases alters the activity,turnover or interactions of the proteins.This posttranslational modification is called _______.
A)S-nitrosylation
B)SH-nitrosylation
C)sulfhydration
D)nitrofruition
E)nitric acidification

Question

Quizplus · Accepted Answer

The given posttranslational modification involving the addition of nitric oxide to the sulfhydryl groups of certain cysteine residues is called S-nitrosylation. The other options such as SH-nitrosylation, sulfhydration, nitrofruition, and nitric acidification are not recognized posttranslational modifications.

The Addition of Nitric Oxide to the Sulfhydryl Groups of Certain