... GRRPsLFG and APDyTTPEMY-NH2were obtained from Dr A˚keEngstro¨m at the Peptide Synthesis and Analysis Laboratory of the Department of Medical Biochemistry and Microbio-logy, Uppsala University. The ... obtained from Promega, and LysC of Achromobacter lytii from Wako. The O-phosphorylatedphosphopeptides EQTRsLDGR-NH2, DHTGFLtEY-VATRWC-NH2, DADEyL-NH2, EGDNDyIIPL-NH2,KKPRyEIRW-NH2, and ... Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden;2Department of Plant Biology,The Swedish University of Agricultural Sciences, Uppsala, SwedenProtein histidine phosphorylation...