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The specific interaction between a defined structural element of the human immunodeficiency virus mRNA ( RRE , the Rev response element ) and the virus - encoded protein Rev has been implicated in the regulation of the export of unspliced or singly spliced mRNA from the nucleus to the cytoplasm .
 GENE: RRE; GENE: Rev response element; GENE: virus - encoded protein Rev
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: RRE; GENE: Rev response element; GENE: virus - encoded protein Rev