Fig. 5.

Model of early ABA-responsive phosphorylation. While a subset of ABA-responsive phosphorylation is diminished in the QR mutant, a single event is fully sustained in response to ABA, and another subset is completely unresponsive to ABA in the QR mutant. Proteins displayed had phosphopeptides identified in WT or both WT and QR mutant untargeted datasets shown in this report. Also included are proteins reported in previously published discovery data (Kline et al., 2010), which were followed up with targeted MS reported here. Phosphorylation identified as ABA responsive in untargeted data but not reproduced in targeted analyses is not shown. Brackets indicate ambiguity in protein accession based on the phosphopeptide sequence identified and used for targeted study.