1353
These observations imply a T cell-specific function for TCF-1 , a notion corroborated by recent observations on Tcf-1 knock-out mice .
 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:
 protein: TCF-1