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These observations imply that TCF-1 is involved in the control of several T cell-specific genes and might thus play an important role in the establishment and maintenance of the mature T cell phenotype .
 cell type: mature T cell phenotype; DNA: T cell-specific genes; 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:
 cell type: mature T cell phenotype; DNA: T cell-specific genes; protein: TCF-1