938
Here we describe an in vitro assay where the NS3 - 4A polyprotein , NS3 , the serine proteinase domain ( the N - terminal 181 residues of NS3 ) , and the NS4A cofactor were produced by cell - free translation and tested for trans - processing of radiolabeled substrates .
 GENE: NS3 - 4A polyprotein; GENE: NS3; GENE: serine proteinase domain ( the N - terminal 181 residues of NS3 ); GENE: NS4A cofactor
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: NS3 - 4A polyprotein; GENE: NS3; GENE: serine proteinase domain ( the N - terminal 181 residues of NS3 ); GENE: NS4A cofactor