Figure 1

(A) Schematic of the conserved G-rich sequence in the EP0 promoter: the G-tracts are shown in red and green ellipses mark the Sp1 binding sites. (B) Illustration of a G-quartet formed by four guanines via Hoogsteen hydrogen bonding.
(A) Schematic of the conserved G-rich sequence in the EP0 promoter: the G-tracts are shown in red and green ellipses mark the Sp1 binding sites. (B) Illustration of a G-quartet formed by four guanines via Hoogsteen hydrogen bonding.