16621
Inhibition was tested on mutants in which one or more of the six Cys residues had been substituted with Ser or with Val .
 Chemical: Cys; Chemical: Ser; Chemical: Val
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: Cys; Chemical: Ser; Chemical: Val