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To examine the role of protein phosphatases in T cell activation , Jurkat cells were treated with okadaic acid , an inhibitor of type 1 and 2A phosphatases , and nuclear extracts were examined for the presence of AP1 as a measure of early T cell activation .
 protein: AP1; protein: protein phosphatases; cell line: Jurkat cells
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: AP1; protein: protein phosphatases; cell line: Jurkat cells