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- W2089282904 abstract "A combination of ion-exchange chromatography, preparative electrophoresis and gel filtration chromatography allowed a 1209-fold purification of one of the two major digestive alpha-amylases from larvae of the larger grain borer, Prostephanus truncatus Horn. The purified enzyme showed a molecular mass of 60.2 kDa, an isoelectric point of 4.7 and an optimal pH for activity of 6.0. The enzyme was heat labile and it was recognized by proteinaceous inhibitors from amaranth seeds (Amaranthus hypochondriacus), whereas extracts from maize (Zea mays) and tepary bean (Phaseolus acutifolius) produced very low inhibition. When the enzyme was measured at different stages of development, maximal activity was found in the second instar larvae. Activity drastically decreased to a very low level during the pupae stage and increased again at the adult stage. A zymogram of the different developmental stages showed two main bands of alpha-amylase activity, which almost disappeared at the pupae stage to increase again during the adult stage, revealing a new, smaller band. This new band may be required for a better adaptation of the adult insect to its new environment." @default.
- W2089282904 created "2016-06-24" @default.
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- W2089282904 date "2000-07-01" @default.
- W2089282904 modified "2023-10-06" @default.
- W2089282904 title "Digestive amylase from the larger grain borer, Prostephanus truncatus Horn" @default.
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- W2089282904 doi "https://doi.org/10.1016/s0305-0491(00)00216-9" @default.
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