10575
Like all sactipeptides , SKF contains a thioether bond , which links the cysteine residue Cys4 with the alpha - carbon of the methionine residue Met12 .
 Chemical: thioether; Chemical: cysteine; Chemical: Cys4; Chemical: alpha - carbon; Chemical: methionine; Chemical: Met12
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: thioether; Chemical: cysteine; Chemical: Cys4; Chemical: alpha - carbon; Chemical: methionine; Chemical: Met12