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One is the 21-base-pair (bp) core element that is responsible for trans-activation by the HTLV-I trans-activator p40tax and that has the ability to bind to cyclic-AMP responsive element binding factor ( CREB )-like factor (s).
 DNA: 21-base-pair (bp) core element; protein: CREB; protein: cyclic-AMP responsive element binding factor; protein: cyclic-AMP responsive element binding factor ( CREB )-like factor; protein: trans-activator; protein: p40tax
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: 21-base-pair (bp) core element; protein: CREB; protein: cyclic-AMP responsive element binding factor; protein: cyclic-AMP responsive element binding factor ( CREB )-like factor; protein: trans-activator; protein: p40tax