... activation. (A) Change in the current amplitudes of the quintuple KAT1 mutantKAT1-T30 8A- S31 2A- S58 9A- S59 0A- S64 1A after PMA application. The characteristics of WT KAT1 in the presence and absence of PMA ... kinase (AAPK ⁄ ABRkinase) from Vicia faba has been found to be present in guard cells and to control stomatal response toABA [13–15]. In an in vitro phosphorylation assay, the Vicia AAPK ⁄ ABR ... Yoshida R, Umezawa T, Mizoguchi T, Takahashi S,Takahashi F & Shinozaki K (2006) The regulatorydomain of SRK2E ⁄ OST1 ⁄ SnRK2.6 interacts with ABI1and integrates abscisic acid (ABA) and osmotic...