1069
IL-7 was observed to induce a rapid and dose-dependent tyrosine phosphorylation of Jak 1 and Jak 3 and concomitantly, the tyrosine phosphorylation and DNA binding activity of multiple STAT proteins .
 protein: Jak 3; protein: STAT proteins; protein: Jak 1; protein: IL-7
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: Jak 3; protein: STAT proteins; protein: Jak 1; protein: IL-7