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Full progress pH-“jump” kinetics for srCatD. The pH-jump reactions were jumped from pH 5.5 to either pH 3.9 (open square) or pH 4.5 (closed square). The “no jump” reaction (solid line), enzyme was preincubated at pH 3.7 and assayed at pH 3.7. Data points at 5 second intervals were omitted for clarity.
