866
DNA-swap experiments using chloramphenicol acetyl-transferase assay demonstrated that androgen can suppress the transcriptional activities of SV40 early promoter via the interaction between this TR2RE- SV40 and the chimeric receptor AR/TR2/AR with the DNA-binding domain of the TR2 orphan receptor flanked by the N-terminal and androgen-binding domains of the androgen receptor .
 protein: TR2RE- SV40; protein: androgen receptor; protein: chloramphenicol acetyl-transferase; protein: chimeric receptor AR/TR2/AR; protein: DNA-binding domain; DNA: SV40 early promoter; protein: TR2 orphan receptor
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: TR2RE- SV40, androgen receptor, chloramphenicol acetyl-transferase, chimeric receptor AR/TR2/AR, DNA-binding domain, SV40 early promoter, TR2 orphan receptor 
Answer:
 protein: TR2RE- SV40; protein: androgen receptor; protein: chloramphenicol acetyl-transferase; protein: chimeric receptor AR/TR2/AR; protein: DNA-binding domain; DNA: SV40 early promoter; protein: TR2 orphan receptor