12142
Site-directed mutagenesis demonstrated that these TRAF binding sites exhibited selective binding for different TRAF proteins .
 protein: TRAF proteins; protein: TRAF binding sites; protein: TRAF
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: TRAF proteins, TRAF binding sites, TRAF 
Answer:
 protein: TRAF proteins; protein: TRAF binding sites; protein: TRAF