7344
Cell growth-regulated expression of mammalian MCM5 and MCM6 genes mediated by the transcription factor E2F .
 protein: transcription factor; protein: E2F
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: transcription factor, E2F 
Answer:
 protein: transcription factor; protein: E2F