Fig. 5.

Response to extracellular H₂O₂pulse. A: Time course of the pulse. B, C, D: Time course of cytoplasmic concentrations of H₂O₂, PS⁻, and PSO⁻, respectively, at depths 0 (violet) to $5\mathrm{\mu }\mathrm{m}$ (red) from the membrane ($0.5\mathrm{\mu }\mathrm{m}$ steps). E, F, G: Spatial profiles of cytoplasmic concentrations of H₂O₂, PS⁻, and PSO⁻, respectively, at times 0 (violet) to 180 s (red) from the membrane (5 s steps). The violet lines in panels E-G reflect the initial concentration change over depth. The time courses and spatial profiles for PSS are very similar to those for PSO⁻. Note the different scales for extracellular H₂O₂, cytoplasmic H₂O₂ and peroxiredoxin concentrations. The dashed gray line marks the time at which the cytoplasmic H₂O₂ concentration reaches its maximum. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)