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How peptide migration and fraction bioactivity are modulated by applied electrical current conditions during electromembrane process separation: A comprehensive machine learning-based peptidomic approach.
Food Res Int
January 2025
Department of Food Science, Université Laval, Québec G1V 0A6, Canada; Laboratoire de Transformation Alimentaire et Procédés ÉlectroMembranaires (LTAPEM, Laboratory of Food Processing and ElectroMembrane Processes), Université Laval, Québec G1V 0A6, Canada; Institute of Nutrition and Functional Foods (INAF), Université Laval, Québec G1V 0A6, Canada. Electronic address:
Industrial wastewaters are significant global concerns due to their environmental impact. Yet, protein-rich wastewaters can be valorized by enzymatic hydrolysis to release bioactive peptides. However, achieving selective molecular differentiation and eventually enhancing peptide bioactivities require costly cascades of membranes.
View Article and Find Full Text PDFIsoelectric Focusing Fractionation Method for Signal Enhancement in Detection of Inactivated Biological Agents Using Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry.
Electrophoresis
January 2025
National Institute for Nuclear, Chemical and Biological Protection, Kamenna, Czech Republic.
Timely identification of highly pathogenic bacteria is crucial for efficient mitigation of the connected harmful health effects. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) of intact cells enables fast identification of the microorganisms based on their mass spectrometry protein fingerprint profiles. However, the MALDI-TOF MS examination must be preceded by a time-demanding cultivation of the native bacteria to isolate representative cell samples to obtain indicative fingerprints.
View Article and Find Full Text PDFProtein "purity," proteoforms, and the albuminome: critical observations on proteome and systems complexity.
Front Cell Dev Biol
December 2024
Proteomics, Lipidomics and Metabolomics Core Facility, School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo, NSW, Australia.
Introduction: The identification of effective, selective biomarkers and therapeutics is dependent on truly deep, comprehensive analysis of proteomes at the proteoform level.
Methods: Bovine serum albumin (BSA) isolated by two different protocols, cold ethanol fractionation and heat shock fractionation, was resolved and identified using Integrative Top-down Proteomics, the tight coupling of two-dimensional gel electrophoresis (2DE) with liquid chromatography and tandem mass spectrometry (LC-MS/MS).
Results And Discussion: Numerous proteoforms were identified in both "purified" samples, across a broad range of isoelectric points and molecular weights.
Physicochemical and techno-functional characterization of soluble proteins extracted by ultrasound from the cricket .
Heliyon
December 2024
Departamento de Biotecnología, Universidad Autónoma Metropolitana-Iztapalapa, Av. Ferrocarril San Rafael Atlixco 186, Col. Leyes de Reforma, 1a. Sección, C.P. 09310, Ciudad de México, Mexico.
The growing interest in using insects for human consumption is due to their numerous benefits. Insects offer efficient protein generation, rapid growth rates, and high nutritional value. The objective of this work was to evaluate the physicochemical and techno-functional properties of the different soluble protein fractions of the cricket using various methods: grinding (CF), defatting (DCF), alkalinization (SPA), and ultrasound-assisted extraction (SPS).
View Article and Find Full Text PDFComplexation with Alginate in Pumpkin Leaf Protein Solutions for the Encapsulation of Folic Acid: The Effect of Extraction Protocols.
Foods
November 2024
Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia.
This study aimed to assess pumpkin leaves as a protein source and determine the feasibility of these proteins to form complexes with alginate for the encapsulation of folic acid. Different isolation protocols, two based on isoelectric precipitation (one with thermal pretreatment and the other with alkali pre-extraction) and one based on stepwise precipitation with ammonium sulfate, were compared regarding the yield and structural properties of the obtained leaf protein concentrates (LPC). The highest purity of protein was achieved using the thermal-acid protocol and the salting-out protocol at 40% saturation.
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