1060
Such transcription factors play a key role in the development of the mature T-cell phenotype by functioning as 'master regulators of T-cell differentiation '.
 protein: transcription factors
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: transcription factors