30139
S - nitrosylation of protein cysteine residues is known to be an important mechanism for nitric oxide signaling .
 Chemical: S; Chemical: cysteine; Chemical: nitric oxide
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: S; Chemical: cysteine; Chemical: nitric oxide