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Page 1 de 126 résultats
Identification and characterization of MOR-CP, a cysteine protease induced by ozone and developmental senescence in maize (Zea mays L.) leaves.
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Among the different classes of endoproteases, cysteine proteases are consistently associated with senescence, defense signaling pathways and cellular responses to abiotic stresses. The objectives of this work were to study the effects of various concentrations of ozone on gene expression and
Characterization of a recombinant zein-degrading protease from Zea mays by Pichia pastoris and its effects on enzymatic hydrolysis of corn starch
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A zein-degrading protease (ZDP) from Zea mays was heterologously expressed using Pichia pastoris and its characteristics and effects on enzymatic hydrolysis of corn starch were investigated in the current study. The optimal temperature and pH for ZDP activity was 40 °C and pH 5.0, respectively. The
Digestibility of Amino Acids, Energy, and Minerals in Roasted Full-Fat Soybean and Expelled-Extruded Soybean Meal Fed to Growing Pigs Without or With Multienzyme Supplement Containing Fiber-Degrading Enzymes, Protease, and Phytase
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Indigestible fiber-protein-phytate complexes reduce the feeding value of soy products. We investigated the effects of multienzyme supplement (MES, Victus) on standardized ileal digestibility (SID) of amino acids (AA) and apparent total tract digestibility (ATTD) of energy and minerals in roasted
Grain Protein Accumulation and the Relationship between Leaf Nitrate Reductase and Protease Activities during Grain Development in Maize (Zea mays L.): I. VARIATION BETWEEN GENOTYPES.
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Four maize hybrids, two with high and two with low levels of postanthesis nitrate reductase activity were grown under field conditions. The characteristic enzyme patterns had been established in previous work. Nitrate reductase and proteases were measured in three representative leaves (ear leaf,
Maize tapetum xylanase is synthesized as a precursor, processed and activated by a serine protease, and deposited on the pollen.
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Pollen coat contains ingredients that interact with the stigma surface during sexual reproduction. In maize (Zea mays L.) pollen coat, the predominant protein is a 35-kDa endoxylanase, whose mRNA is located in the tapetum cells enclosing the maturing pollen in the anthers. This 2.0-kb mRNA was found
Lignin peroxidase and protease production by Streptomyces viridosporus T7A in the presence of calcium carbonate. Nutritional and regulatory carbon sources.
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Streptomyces are good producers of enzymes of industrial interest, such as lignin peroxidase (LiP) and proteases. To optimize production of these enzymes by Streptomyces viridosporus T7A, two parameters were evaluated: carbon sources and calcium carbonate. Shake-flask fermentations were performed
Regulation of protein degradation and protease expression by mannose in maize root tips. Pi sequestration by mannose may hinder the study of its signaling properties.
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The effects of mannose (Man) and glucose (Glc) on central metabolism, proteolysis, and expression of the root starvation-induced protease (RSIP; F. James, R. Brouquisse, C. Suire, A. Pradet, P. Raymond [1996] Biochem J 320: 283-292) were investigated in maize (Zea mays L. cv DEA) root tips. Changes
A Ca(2+)-dependent cysteine protease is associated with anoxia-induced root tip death in maize.
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Imposition of anoxia on maize (Zea mays cv. B73) seedlings for 48 h or longer led to the death of the root tip. The necrosis extended into the root axis during postanoxic treatment, leading to the mortality of 30-50% of the seedlings. Using zymography, protease profiles in the root tissues of anoxic
Dissociation of polysome aggregates by protease k.
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Apparent large size-classes of zein-synthesizing polysomes from developing kernels of Zea mays L. were converted to smaller polysomes after treatment with Protease K. The reduction in polysome size was not a result of ribonuclease activity, inasmuch as the enzyme did not affect the free polysomes or
Isolation of Mucorales from processed maize (Zea mays L.) and screening for protease activity.
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Mucorales were isolated from maize flour, corn meal and cooked cornflakes using surface and depth plate methods. Rhizopus oryzae, Circinella muscae, Mucor subtilissimus, Mucor hiemalis f. hiemalis, Syncephalastrum racemosum, Rhizopus microsporus var. chinensis and Absidia cylindrospora showed
Protease-resistant fraction of smoked, dried bonito alleviates atopic dermatitis-like skin lesions in NC/Nga mice.
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The effect of smoke-dried bonito undigested fraction remaining after microbial protease treatment (SDBR) on a spontaneously occurring mouse model of atopic dermatitis was studied in male 5-wk-old, NC/Nga mice. Smoke-dried bonito, Katsuobushi, is a traditional Japanese food. SDBR contains 2 major
Computational study on substrate specificity of a novel cysteine protease 1 precursor from Zea mays.
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Cysteine protease 1 precursor from Zea mays (zmCP1) is classified as a member of the C1A family of peptidases (papain-like cysteine protease) in MEROPS (the Peptidase Database). The 3D structure and substrate specificity of the zmCP1 is still unknown. This study is the first one to build the 3D
zmsbt1 and zmsbt2, two new subtilisin-like serine proteases genes expressed in early maize kernel development.
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UNASSIGNED
Two subtilisin-like proteases show highly specific and complementary expression patterns in developing grains. These genes label the complete surface of the filial-maternal interface, suggesting a role in filial epithelial differentiation. The cereal endosperm is the most important source
A sensitive diffusion plate assay for screening inhibitors of protease activity in plant cell fractions.
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Proteolytic activity was detected, using a sensitive radial diffusion plate assay, in the plasma membrane fractions of corn (Zea mays L.) roots and from roots of several other plant species. The proteases could be effectively inhibited in corn with phenylmethane sulfonyl fluoride or chymostatin.
Effects of dietary supplementation with a protease on the apparent ileal digestibility of the weaned piglet.
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The effects of an acid-stable protease (RONOZYME ProAct) supplemented to a corn (Zea mays)-soybean (Glycine max) meal-based diet on apparent ileal digestibility (AID) of nutrients were evaluated in 120 weaned piglets (28 d old; 8.17 ± 0.90 kg). Pigs were divided into 2 equal groups and had free
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