3525
We examined the contribution of the M - MuLV enhancers to the transcriptional activity and pathogenesis of M - MuLV by constructing LTRs containing heterologous enhancer elements .
 GENE: M - MuLV enhancers
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: M - MuLV enhancers