5318
By treating monkey COS cells with oligonucleotides linked to psoralen , we have generated targeted mutations in a simian virus 40 ( SV40 ) vector contained within the cells via intracellular triple helix formation .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
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