Supplementary Data: movie files: Movie S1: BWP17-GCaMP 1 mM – 200 mM Ca2+ Movie S2: WT-GCaMP 1M NaCl Movie S3: BWP17-GCaMP 0.6 M Ca2+ Movie S4: WT-GCaMP 0.05% SDS Movie S5: WT-GCaMP 5 mM H2O2 Movie S6: Empty-vector 5 mM H2O2 Movie S7: cap1∆-GCaMP 5 mM H2O2 Movie S8: hog1∆-GCaMP 5 mM H2O2 Movie S9: cnb1∆-GCaMP 5 mM H2O2 Movie S10: crz1∆-GCaMP 5 mM H2O2 Movie S11: cch1∆-GCaMP 5 mM H2O2 Movie S12: yvc1∆-GCaMP 5 mM H2O2