30346
Protein arginine deiminase 4 ( PAD4 ) is an enzyme that converts peptidyl - arginine to citrulline .
 Chemical: arginine; Chemical: arginine
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: arginine, arginine 
Answer:
 Chemical: arginine; Chemical: arginine