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. Author manuscript; available in PMC: 2018 Jan 30.
Published in final edited form as: Virology. 2013 May 29;443(1):11–19. doi: 10.1016/j.virol.2013.04.033

Figure 9.

Figure 9

Model. Transcription initiation from the late promoter is increased in response to cellular differentiation signals through the activity of differentiation-specific transcription factors (TF-X) such as C/EBPβ (Bodily et al., 2006; Bodily and Meyers, 2005; Gunasekharan et al., 2012; Kukimoto and Kanda, 2001; Kukimoto et al., 2006; Spink and Laimins, 2005). E7 promoter transcription through activation of a specific transcription factor or coregulator (TF-Y), or through effects on the general transcription machinery.