4678
Western immunoblot analysis detected p55gag and its cleavage products p39 and p27 in purified particles derived by expression of gag and gag - pol , respectively .
 GENE: p55gag; GENE: p39; GENE: p27; GENE: gag; GENE: gag; GENE: pol
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: p55gag; GENE: p39; GENE: p27; GENE: gag; GENE: gag; GENE: pol