1625
Tyrosine phosphorylation of Jak1 , Jak2 , and Stat1 increased markedly, in a dose-dependent manner, in U-937 cells incubated with gamma interferon .
 protein: gamma interferon; cell line: U-937 cells; protein: Stat1; protein: Jak1; protein: Jak2
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: gamma interferon; cell line: U-937 cells; protein: Stat1; protein: Jak1; protein: Jak2