FIG 4 .

The 3′ UTR sequence containing the GGAUG element forms a structure consistent with a G-quadruplex. (A) RNA oligonucleotides used in the TGGE experiments highlighting differences with the wild-type oligonucleotide (top). (B) Silver-stained TGGE gel images in the presence (left) or absence (right) of 2.5 mM potassium acetate (KOAc). The linear RNA species is denoted as band I, and the faster-migrating species is denoted as band II. The oligonucleotide used in the analysis is indicated on the right.