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Accordingly , superpeptide antigenic material was readily detected by immunoblotting cell extracts and enriched in vacuolar preparations of PrA deficient mutant cells .
 GENE: PrA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: PrA