258
The retinoblastoma gene product negatively regulates transcriptional activation mediated by the human cytomegalovirus IE2 protein .
 protein: transcriptional activation; protein: retinoblastoma gene product; protein: human cytomegalovirus IE2 protein
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: transcriptional activation, retinoblastoma gene product, human cytomegalovirus IE2 protein 
Answer:
 protein: transcriptional activation; protein: retinoblastoma gene product; protein: human cytomegalovirus IE2 protein