1968
Activation of a novel serine /threonine kinase that phosphorylates c-Fos upon stimulation of T and B lymphocytes via antigen and cytokine receptors .
 protein: cytokine receptors; protein: serine /threonine kinase; protein: c-Fos
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: cytokine receptors, serine /threonine kinase, c-Fos 
Answer:
 protein: cytokine receptors; protein: serine /threonine kinase; protein: c-Fos