To determine the optimal pH of the purified enzymes, we used the following
buffers: pH 3e4, 100 mM citrate buffer; pH 4e6, 100 mM acetate buffer; pH 6e8,
100 mM phosphate buffer. To assess the pH stability of the enzymes, their residual
activity was measured after a 30 min pre-incubation period in the absence of substrate
at 50C in 50 mM buffers at different pH levels. To measure their thermostability,
the enzymes were incubated in 100 mM acetate buffer (pH 5.0) at various
temperatures for 60 min.
To determine the optimal pH of the purified enzymes, we used the followingbuffers: pH 3e4, 100 mM citrate buffer; pH 4e6, 100 mM acetate buffer; pH 6e8,100 mM phosphate buffer. To assess the pH stability of the enzymes, their residualactivity was measured after a 30 min pre-incubation period in the absence of substrateat 50C in 50 mM buffers at different pH levels. To measure their thermostability,the enzymes were incubated in 100 mM acetate buffer (pH 5.0) at varioustemperatures for 60 min.
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