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Two subclones were found to have an abnormal response to the protein kinase C ( PKC ) activator PMA .
 protein: protein kinase C; protein: PKC
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: protein kinase C; protein: PKC