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Interaction of H - 2Eb with an IAP retrotransposon in the A20 / 2J B cell lymphoma .
 H - 2Eb, IAP retrotransposon
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 H - 2Eb, IAP retrotransposon