6493
Protein - disulfide isomerase ( PDI ) and related members of the PDI family assist in the folding of substrates by catalyzing the oxidation of two cysteines and isomerization of disulfide bonds as well as by acting as chaperones .
 Chemical: disulfide; Chemical: cysteines; Chemical: disulfide
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: disulfide, cysteines, disulfide 
Answer:
 Chemical: disulfide; Chemical: cysteines; Chemical: disulfide