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Light scattering determination of the stoichiometry for protease-potato serine protease inhibitor complexes.

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The interaction between pancreatic proteases and a serine protease inhibitor purified from potato tubers was investigated by chromatography-coupled light scattering measurements. The molar mass distribution in the chromatogram was compared to theoretical values calculated for the different possible

Novel in vitro inhibitory functions of potato tuber proteinaceous inhibitors.

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Plant protease inhibitors are a structurally highly diverse and ubiquitous class of small proteins, which play various roles in plant development and defense against pests and pathogens. Particular isoforms inhibit in vitro proteases and other enzymes that are not their natural substrates, for

Reactive sites of the 21-kD protein inhibitor of serine proteinases from potato tubers.

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The effect of modifications of Met, Arg, and Lys residues on the inhibitory activity of a serine proteinase-inhibiting 21-kD protein from potato tubers has been studied. The data indicate that the 21-kD protein has two independent reactive sites for human leukocyte elastase (or chymotrypsin) and

In vivo Responses of Honey Bee Midgut Proteases to Two Protease Inhibitors from Potato.

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Potato protease inhibitors, POT-1 and POT-2, were fed to newly emerged adult honey bees in cages at different doses in either sugar syrup (0.2 or 0.01% w:v) or pollen food (1 or 0.2% w:w). In vivo activities of three digestive endopeptidases (trypsin, chymotrypsin and elastase) and one exopeptidase

X-ray structure analysis and characterization of AFUEI, an elastase inhibitor from Aspergillus fumigatus.

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Elastase from Aspergillus sp. is an important factor for aspergillosis. AFUEI is an inhibitor of the elastase derived from Aspergillus fumigatus. AFUEI is a member of the I78 inhibitor family and has a high inhibitory activity against elastases of Aspergillus fumigatus and Aspergillus flavus, human

Purification and characterization of a trypsin inhibitor from Solanum tuberosum.

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A trypsin inhibitor isolated from a potato acetone powder has been purified by affinity chromatography. This protein inhibits trypsin mole per mole. To a lesser extent it combines also with chymotrypsin and elastase. For trypsin, K1 = 8 X 10(-7) M. The inhibitor has a single polypeptide chain of 207

Potato tuber protein proteinase inhibitors belonging to the Kunitz soybean inhibitor family.

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Three protein inhibitors of proteolytic enzymes with molecular weights 21, 22, and 23 kD were isolated from potato tubers (Solanum tuberosum L.) by ammonium sulfate precipitation followed by gel and ion-exchange chromatography. The 21- and 22-kD proteins were shown to be serine proteinase inhibitors

[Isolation and characteristics of a new trypsin and chymotrypsin inhibitor from potato tubers].

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A novel trypsin and chymotrypsin inhibitor has been isolated from potato (Solanum tuberosum L.) tubers. The isolation procedure included ammonium sulfate precipitation, gel-chromatography on Sephadex G-75 and ion-exchange chromatography on DEAE-cellulose. The inhibitor interacts with trypsin and

Heterologous expression, purification, and properties of a potato protein inhibitor of serine proteinases.

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The gene PKPI-B10 [AF536175] encoding in potato (Solanum tuberosum L., cv. Istrinskii) a Kunitz-type protein inhibitor of proteinases (PKPI) has been cloned into the pET23a vector and then expressed in Escherichia coli. The recombinant protein PKPI-B10 obtained as inclusion bodies was denatured,

Primary structure of a 21-kD protein from potato tubers.

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A 21-kD protein isolated earlier from potato tubers (Solanum tuberosum L.) has two isoforms, with pI 6.3 and 5.2, which were separated by fast protein ion-exchange chromatography on a Mono Q column. The primary structures of the two forms consisted of 187 and 186 amino acid residues. Both isoforms

Primary structure of potato kunitz-type serine proteinase inhibitor.

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The serine proteinase inhibitor (PSPI-21) isolated from potato tubers (Solanum tuberosum L.) comprises two protein species with pI 5.2 and 6.3, denoted as PSPI-21-5.2 and PSPI-21-6.3, respectively. They were separated by anion exchange chromatography on a Mono Q FPLC column. Both species tightly

First report on a potato I family chymotrypsin inhibitor from the seeds of a Cucurbitaceous plant, Momordica cochinchinensis.

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A 7514-Da chymotrypsin inhibitor was isolated from the seed extract of Momordica cochinchinensis (Family Cucurbitaceae) by chromatography on chymotrypsin-Sepharose 4B and subsequently by C18 reversed-phase HPLC. This inhibitor, named MCoCl, possessed remarkable thermostability and was stable from pH

The distribution of serine proteinase inhibitors in seeds of the Asteridae.

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The Asteridae is one of the most successful clades of flowering plants comprising some 80,000 species. Despite this diversity, analysis of seeds from 398 species (representing 8 orders, 32 families and 181 genera) showed just two major types of serine proteinase inhibitors (PI). PIs of the potato

Digestive proteolytic activity in larvae of tomato moth, Lacanobia oleracea; effects of plant protease inhibitors in vitro and in vivo.

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Three distinct digestive protease activities, with strongly alkaline pH optima, were identified in the gut of tomato moth (Lacanobia oleracea) larvae, and characterised using specific synthetic substrates and inhibitors. These were; a trypsin-like activity, a chymotrypsin-like activity specific for

Carboxypeptidase inhibitors from Ascaris suum: the primary structure.

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The carboxypeptidase A inhibitor from Ascaris suum was isolated from aqueous extracts by affinity chromatography toward immobilized carboxypeptidase A. The amino acid sequence is DQVRKCLSDT10DCTNGEKCVQ20KNKICSTIVE30IQRCEKEHFT40IPCKSNNDCQ50VWAHEKICN K60LPWGL65 . The carboxypeptidase A inhibitor is

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