4900
Newly translated STAT1 binds in equilibrium fashion to STAT2 and STAT3 , but we show that STAT2 and STAT3 exist in separate heterocomplexes with STAT1 , consistent with a model in which STAT1 contains a common binding site for other STAT proteins .
 protein: STAT2; protein: STAT3; protein: STAT1; protein: heterocomplexes; protein: STAT1; protein: STAT1; protein: STAT2; protein: STAT3; protein: STAT proteins
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: STAT2, STAT3, STAT1, heterocomplexes, STAT1, STAT1, STAT2, STAT3, STAT proteins 
Answer:
 protein: STAT2; protein: STAT3; protein: STAT1; protein: heterocomplexes; protein: STAT1; protein: STAT1; protein: STAT2; protein: STAT3; protein: STAT proteins