9191
AIMS AND BACKGROUND: Structurally altered proteins (derived from chromosomal translocations or gene mutations ) can be considered tumor specific antigens and represent an attractive target for a T-cell mediated response .
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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:
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