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For xylooligosaccharide (XO) production, endo-xylanase from Thermobifida fusca was modified by error-prone PCR and DNA shuffling. The G4SM1 mutant (S62T, S144C, N198D, and A217V) showed the most improved hydrolytic activity and was two copies expressed in Pichia pastoris under the control of GAP promoter. The maximum xylanase activity in culture(More)
The mature peptide of Bacillus licheniformis xylanase A (BlxA) was successfully expressed in Pichia pastoris under the control of AOX1 promoter. After 96-h 0.25% methanol induction, the activity of recombinant B. licheniformis xylanase A (reBlxA) in culture supernatant was 122.9 U/mg. Enzymatic properties assays showed that the optimum temperature and pH(More)
To improve the thermostability and catalytic activity of Aspergillus niger xylanase A (AnxA), its N-terminus was substituted with the corresponding region of Thermomonospora fusca xylanase A (TfxA). The constructed hybrid xylanase, named ATx, was overexpressed in Pichia pastoris and secreted into the medium. After 96-h 0.25% methanol induction, the activity(More)
Traces of zinc oxide nanoparticles (ZnO NPs) used may be found in the liver and kidney. The aim of this study is to determine the optimal viability assay for using with ZnO NPs and to assess their toxicity to human hepatocyte (L02) and human embryonic kidney (HEK293) cells. Cellular morphology, mitochondrial function (MTT assay), and oxidative stress(More)
The mature peptide of Aspergillus niger xylanase A (AnxA) was successfully expressed in Pichia pastoris at high levels under the control of AOX1 promoter. The recombinant AnxA (reAnxA) was secreted into culture medium. After 96-h 0.25% methanol induction, the activity of reAnxA in the culture supernatant reached the peak, 175 U/mg, which was 1.9 times as(More)
The xylan binding domain (XBD) and linker sequences (LS) from thermostable and thermophilic Thermomonospora fusca xylanase A (TfxA) was fused to the carboxyl-terminus of a family 11 hybrid xylanase ATx. The constructed chimera (ATxX) was successfully expressed in Pichia pastoris, partially purified to homogeneity, and then characterized in detail. After(More)
Localization of inelastic ¯ ow and crack initiation in fcc single crystals are studied experimentally and by numerical simulations, focusing on the anisotropic inelastic response of the crystal, and the mechanism of possible crack initiation and growth, produced upon unloading by the residual inhomogeneous plastic strains. Hollow circular cylinders of(More)
The anticancer activities of Lactoferrin (Lf) and Lf nanoliposomes in Caco-2 cells were observed in this study, and mitochondrial function (MTT assay), count kit-8(CCK-8), detection of intracellular reactive oxygen species (ROS) and apoptosis induction (AO/EB staining) assays were used to evaluate the anticancer activity. MTT results demonstrated that Lf(More)
Response surface methodology based on a central composite rotatable design has been successfully used to model and optimize biochemical and biotechnological processes. Heat treatment could have an effect on beta-lactoglobulin (β-Lg) and lead to allergic reaction. To reduce this phenomenon, liposomes were used as carriers in this research. The mass ratio of(More)