8241
Phosphorylation of TRAF2 inhibits binding to the CD40 cytoplasmic domain .
 protein: TRAF2; protein: CD40 cytoplasmic domain
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: TRAF2, CD40 cytoplasmic domain 
Answer:
 protein: TRAF2; protein: CD40 cytoplasmic domain