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We also examined the effect of proteolytic processing in the MVE nonstructural polyprotein segment mediated by the viral proteinase NS3 on antigen processing and presentation of the MVE H - 2Kk - restricted T cell determinant .
 viral proteinase NS3
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 viral proteinase NS3