4555
Analyses of nuclear extracts by electrophoretic DNA mobility shift assays showed that decreased IL-2 production by stimulated T cells of elderly individuals was closely associated with impairments in the activation of both AP-1 and NF-AT .
 protein: NF-AT; protein: AP-1; cell type: stimulated T cells; protein: IL-2
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: NF-AT, AP-1, stimulated T cells, IL-2 
Answer:
 protein: NF-AT; protein: AP-1; cell type: stimulated T cells; protein: IL-2