tokens: The mechanism of activation is due to S-nitrosylation of a critical cysteine residue which stimulates guanine nucleotide exchange .
folded_tokens: the mechanism of activation is due to s-nitrosylation of a critical cysteine residue which stimulates guanine nucleotide exchange .
labels: O B-other_name I-other_name I-other_name O O O B-other_name O O O B-amino_acid_monomer I-amino_acid_monomer O O O O O O