4222
Plasmid pSP64E6E7 which contains the reading frames of both E6 and E7 was constructed in order to study the expression of both proteins in a coupled transcription / rabbit reticulocyte translation system .
 GENE: E6; GENE: E7
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: E6; GENE: E7