| Assay Method Information | |
| | Enzyme Activity Assay |
| Description: | α-Amylase activity was assayed with the chromogenic substrate RBB-starch. An enzyme aliquot was incubated (20 min, 26°C) with 0.3% RBB-starch in 0.1 M Britton-Robinson buffer at the pH optimum of the enzyme (6.5 for Aca s 4 and A. siro extract, 7.0 for D. farinae extract, 6.9 for PPA) or at pH 4.5-9.0 (pH profiling). The reaction was stopped with 0.2 M NaOH, the mixture was centrifuged (10000 g, 10 min), and the absorbance at 620 nm of the supernatant was measured against a control sample (incubated in the absence of enzyme/extract). |
| Affinity data for this assay | |
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