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SM is a phosphoprotein in EBV -infected cells and can be phosphorylated in vitro with casein kinase II ( CKII ).
 SM, CKII, phosphoprotein, -infected cells, casein kinase II
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 SM, CKII, phosphoprotein, -infected cells, casein kinase II