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The addition of antisense oligonucleotides to c-fos significantly inhibited IL 6 -induced IgM production by SKW 6.4 cells (p less than 0.001), whereas control oligonucleotides had no inhibitory effect.
 DNA: c-fos; protein: IL 6; protein: IgM; cell line: SKW 6.4 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:
 DNA: c-fos; protein: IL 6; protein: IgM; cell line: SKW 6.4 cells