1802
As neutralizing anti- IL-6 Abs effectively down-regulated the early induction of STAT proteins and as exogenously added IL-6 rapidly activated DNA binding similar to TCR -mediated bindings , it can be concluded that IL-6 is the factor responsible for the activation of STAT proteins in a primary T cell response .
 protein: IL-6; protein: STAT proteins; protein: neutralizing anti- IL-6 Abs; protein: IL-6; protein: STAT proteins; protein: IL-6; protein: TCR
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: IL-6; protein: STAT proteins; protein: neutralizing anti- IL-6 Abs; protein: IL-6; protein: STAT proteins; protein: IL-6; protein: TCR