2081
The core cysteines , ( C909 ) of islet antigen - 2 and ( C945 ) of islet antigen - 2 beta , are crucial to autoantibody binding in type 1 diabetes .
 Chemical: cysteines
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: cysteines