"The initiation of (1)O2 signaling in grana margins depends on EX1 and the ATP-dependent zinc metalloprotease FtsH. As FtsH cleaves also the D1 protein during the disassembly of damaged PSII EX1- and (1)O2-mediated signaling seems to be not only spatially but also functionally associated with the repair of PSII"xsd:string