13999
We show that Cys31 initiates the reaction with sulfite through the formation of S - sulfocysteine ( RS - SO3 ( 2 - ) ) and Cys60 is required to fully derivatize CstR to CstR2 ( RS - SR ' ) and CstR2 ( RS - S - SR ' ) .
 Chemical: Cys31; Chemical: sulfite; Chemical: S - sulfocysteine; Chemical: RS - SO3 ( 2 - ); Chemical: Cys60; Chemical: RS - SR '; Chemical: RS - S - SR '
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: Cys31; Chemical: sulfite; Chemical: S - sulfocysteine; Chemical: RS - SO3 ( 2 - ); Chemical: Cys60; Chemical: RS - SR '; Chemical: RS - S - SR '