498
We have purified a new T-cell-specific factor , TCF-1 alpha , that is implicated in the activation of genes encoding a major component of the human T-cell receptor ( TCR ).
 protein: T-cell-specific factor; protein: TCR; protein: human T-cell receptor; 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: T-cell-specific factor; protein: TCR; protein: human T-cell receptor; protein: TCF-1 alpha