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Previous cotransfection experiments had demonstrated that ectopic expression of the lymphocyte-specific transcription factor Oct2 could efficiently activate a promoter containing an octamer motif .
 protein: lymphocyte-specific transcription factor; protein: Oct2; DNA: octamer motif; DNA: promoter
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: lymphocyte-specific transcription factor; protein: Oct2; DNA: octamer motif; DNA: promoter