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Thus , the positive effect of NS1 on the steady - state levels of P4 transcripts depends on the amplification of gene copy number and the integrity of the terminal repeats .
 GENE: NS1; GENE: P4 transcripts
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: NS1; GENE: P4 transcripts