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Our results show that the structure of this promoter only permits productive interactions of the two transcription factors Sp1 and CP1 with the basal transcription machinery in the presence of enhancer sequences .
 DNA: enhancer sequences; protein: transcription factors; protein: CP1; DNA: promoter; protein: Sp1
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:
 DNA: enhancer sequences; protein: transcription factors; protein: CP1; DNA: promoter; protein: Sp1