16623
Mutants C23V / C58V / C155V / C89S / C283S and C23V / C58V / C136V / C89S / C283S containing only C136 or C155 , respectively , were inhibited at a much lower extent respect to the wild - type , while the mutant C136S / C155S in which the two Cys were substituted and the C - less protein were virtually insensitive to inhibition .
 Chemical: Cys
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