Figure 3From: Key elements of the human bocavirus type 1 (HBoV1) promoter and its trans-activation by NS1 proteinComparison of the relative activity of the HBoV1 promoter in different cell lines. Cells were transfected with pGL3-(1–252)/P1 and pGL3-pCMV, respectively. The pGL3-Basic was used as a negative control without any promoter sequence. The mean values and standard deviation (SD) of three independent experiments are shown (**: p < 0.01).Back to article page