1160
Analysis of the gag and rev proteins in the transfected cells demonstrated that these proteins were not detectable in cells transfected with the tat mutants but could be readily detected when the mutations were complemented in trans with a tat expression vector .
 GENE: gag; GENE: rev proteins; GENE: tat mutants; GENE: tat
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: gag; GENE: rev proteins; GENE: tat mutants; GENE: tat