Summary of Electrophoretic Mobility Shift Assays with WRKY28. The indentified WRKY28 binding sites are indicated against a grey background in the sequence of the 960 bp ICS1 promoter (A). Schematic representation of the ICS1 promoter fragments analyzed by EMSA (B). Plus-signs in the right column indicate fragments that produced band shifts; minus-signs, fragments that did not produce a band shift. The position of the WK-like sequence or TGAC core sequences is indicated by vertical lines. Consensus WRKY28 binding sequence deduced from the EMSAs (C).