Figure 2.

Increase in oxygen content in the medium compared to a full catalase reaction: X axis = time in seconds with addition of H₂O₂ considered as zero time; Y axis = oxygen release expressed as percentage of the amount expected from a 100% yield for the catalase reaction (O₂ = ½ H₂O₂). The two experiments presented in Figure 2a are in black symbols (+100 and +500 µM H₂O₂) while those presented in Figure 2b are in grey (+25 µM and +100 µM). Empty symbols represent results obtained when subtracting the oxygen release in the two concomitant chambers, i.e., either 100 − 25 = 75 µM H₂O₂ or 500 − 100 = 400 µM, with one data point out of ten shown for the sake of clarity.