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Third, TCF-1 bound specifically to a functional T cell-specific element in the T cell receptor alpha (TCR-alpha) enhancer .
 DNA: T cell receptor alpha (TCR-alpha) enhancer; DNA: T cell-specific element; protein: TCF-1
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: T cell receptor alpha (TCR-alpha) enhancer; DNA: T cell-specific element; protein: TCF-1