Figure 4From: Key elements of the human bocavirus type 1 (HBoV1) promoter and its trans-activation by NS1 proteinThe HBoV1 full-length and truncated promoters were constructed and used for analysis of the promoter activity. Promoter essential elements and potential binding sites for transcription factors are indicated (shaded boxes). The bold solid lines below the HBoV1 promoter (top line) represent the location and lengths of the promoters.Back to article page