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Interestingly, tg epsilon26 thymocytes expressed GATA-3 and TCF-1 , but not LEF-1 and PEBP-2alpha , among T cell-specific transcription factors that are involved in early T cell development , indicating that GATA-3 and TCF-1 expressed during thymocyte development do not necessarily determine the cell fate into T cell lineage .
 PEBP-2alpha, T cell-specific transcription factors, LEF-1, tg epsilon26, T cell lineage, tg epsilon26 thymocytes, TCF-1, TCF-1, GATA-3, GATA-3
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 PEBP-2alpha, T cell-specific transcription factors, LEF-1, tg epsilon26, T cell lineage, tg epsilon26 thymocytes, TCF-1, TCF-1, GATA-3, GATA-3