507
Thus, the transcriptional activity of TCF-1 alpha appears to depend on the TCF-2 alpha and T alpha 1 ( CREB ) transcription factors and the context of its binding site within the TCR alpha enhancer .
 protein: TCF-2 alpha; DNA: TCR alpha enhancer; protein: CREB; protein: transcription factors; protein: T alpha 1; protein: TCR; protein: TCF-1 alpha
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: TCF-2 alpha; DNA: TCR alpha enhancer; protein: CREB; protein: transcription factors; protein: T alpha 1; protein: TCR; protein: TCF-1 alpha