435
( A ) RNA hairpin structures at the 5 ' untranslated region of endonuclease ORFs in the gp41 - 1 ( representing the very similar sequences of gp41 - 1 - 7 ) , nrdA - 5 and DnaE - 1 gene loci .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
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