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Dependence of GR2 activity on pH. Activity was determined using saturating glyoxylate and NADPH as substrates, and 2-morpholino-ethanesulphonic acid (pH 5.5–6.8), HEPES (pH 6.8–8.2), N-tris(hydroxymethyl)methyl-4-aminobutanesulphonic acid (pH 8.2–9.6), and 3-(cyclohexylamino)-1-propanesulphonic acid (pH 9.7) as buffers. Data represent the mean ±SE. of triplicate measurements from a typical enzyme preparation.
