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  1. Article ; Online: N-Glycosylation as a Modulator of Protein Conformation and Assembly in Disease.

    Pasala, Chiranjeevi / Sharma, Sahil / Roychowdhury, Tanaya / Moroni, Elisabetta / Colombo, Giorgio / Chiosis, Gabriela

    Biomolecules

    2024  Volume 14, Issue 3

    Abstract: ... glycosylation and protein conformation, with a specific focus on the profound impact of N-glycans ... protein of the SARS virus, illustrating how N-glycans regulate the infectivity of pathogenic agents ... exploring instances where N-glycosylation transforms physiological protein structures into disease ...

    Abstract Glycosylation, a prevalent post-translational modification, plays a pivotal role in regulating intricate cellular processes by covalently attaching glycans to macromolecules. Dysregulated glycosylation is linked to a spectrum of diseases, encompassing cancer, neurodegenerative disorders, congenital disorders, infections, and inflammation. This review delves into the intricate interplay between glycosylation and protein conformation, with a specific focus on the profound impact of N-glycans on the selection of distinct protein conformations characterized by distinct interactomes-namely, protein assemblies-under normal and pathological conditions across various diseases. We begin by examining the spike protein of the SARS virus, illustrating how N-glycans regulate the infectivity of pathogenic agents. Subsequently, we utilize the prion protein and the chaperone glucose-regulated protein 94 as examples, exploring instances where N-glycosylation transforms physiological protein structures into disease-associated forms. Unraveling these connections provides valuable insights into potential therapeutic avenues and a deeper comprehension of the molecular intricacies that underlie disease conditions. This exploration of glycosylation's influence on protein conformation effectively bridges the gap between the glycome and disease, offering a comprehensive perspective on the therapeutic implications of targeting conformational mutants and their pathologic assemblies in various diseases. The goal is to unravel the nuances of these post-translational modifications, shedding light on how they contribute to the intricate interplay between protein conformation, assembly, and disease.
    MeSH term(s) Glycosylation ; Protein Processing, Post-Translational ; Polysaccharides/chemistry ; Protein Conformation ; Prions/metabolism
    Chemical Substances Polysaccharides ; Prions
    Language English
    Publishing date 2024-02-27
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2701262-1
    ISSN 2218-273X ; 2218-273X
    ISSN (online) 2218-273X
    ISSN 2218-273X
    DOI 10.3390/biom14030282
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Atlantic salmon adapt to low dietary n-3 PUFA and warmer water temperatures by increasing feed intake and expression of n-3 biosynthesis-related transcripts.

    Colombo, Stefanie M / Budge, Suzanne M / Hall, Jennifer R / Kornicer, Jovana / White, Nolan

    Fish physiology and biochemistry

    2022  Volume 49, Issue 1, Page(s) 39–60

    Abstract: Climate change can have cascading impacts on biochemical reactions in aquatic ecosystems. Aquatic ectotherms can adapt to surrounding temperatures by using long-chain polyunsaturated fatty acids (LC-PUFAs) to maintain cell membrane fluidity. In a warming ...

    Abstract Climate change can have cascading impacts on biochemical reactions in aquatic ecosystems. Aquatic ectotherms can adapt to surrounding temperatures by using long-chain polyunsaturated fatty acids (LC-PUFAs) to maintain cell membrane fluidity. In a warming scenario, less LC-PUFA is needed to maintain fluidity. Our objective was to determine the impact of low dietary LC-PUFA and warm water temperature on growth, fatty acid (FA) storage, and expression of lipid metabolism-related transcripts in Atlantic salmon. Salmon (141 g) were fed two diets (high or low LC-PUFA) at either 12 °C or 16 °C for 16 weeks. Salmon weighed more and consumed more food at 16 °C and when fed the low-LC-PUFA diet. Liver and muscle FA mostly depended on diet rather than temperature. DHA in muscle was higher at 16 °C and in salmon fed the high-LC-PUFA diet. Levels of FA desaturation transcripts were more highly expressed at 16 °C and in salmon fed the low-LC-PUFA diet, which suggests synthesis of LC-PUFA. Overall, with slow, chronic temperature increases, salmon may adapt to low dietary LC-PUFA by synthesizing more when required.
    MeSH term(s) Animals ; Fatty Acids, Omega-3/metabolism ; Salmo salar/genetics ; Salmo salar/metabolism ; Temperature ; Water ; Ecosystem ; Diet/veterinary ; Fatty Acids/metabolism ; Eating
    Chemical Substances Fatty Acids, Omega-3 ; Water (059QF0KO0R) ; Fatty Acids
    Language English
    Publishing date 2022-12-16
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 292907-7
    ISSN 1573-5168 ; 0920-1742
    ISSN (online) 1573-5168
    ISSN 0920-1742
    DOI 10.1007/s10695-022-01157-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Odonate diversity of a highly urbanised region: An annotated checklist of the damselflies and dragonflies (Insecta, Odonata) of Lario and Brianza (Lombardy, N Italy).

    Bazzi, Gaia / Galimberti, Andrea / Foglini, Claudio / Bani, Luciano / Bazzi, Lionello / Bonvicini, Piero / Brembilla, Roberto / Brigo, Massimo / Cavenaghi, Alberto / Colombo, Giuseppe / Della Pietà, Cesare / Galliani, Carlo / Guarnaroli, Ettore / Larroux, Nicola / Monti, Alessandro / Orioli, Valerio / Ornaghi, Francesco / Pilon, Nicola / Pirotta, Giuliana /
    Radaelli, Giovanni / Tessa, Giulia / Assandri, Giacomo

    Biodiversity data journal

    2023  Volume 11, Page(s) e111358

    Abstract: ... The region comprised between Lario and Brianza (Provinces of Como, Lecco and Monza and Brianza - Lombardy, N ...

    Abstract Background: Given their sensitivity to environmental alterations, odonates act as reliable bioindicators to assess the effects of changes in freshwater ecosystems and associated terrestrial habitats. The region comprised between Lario and Brianza (Provinces of Como, Lecco and Monza and Brianza - Lombardy, N Italy) is one of the most urbanised of the Italian peninsula and large parts of its territory have been heavily altered, especially at low elevation. Despite this pervasive anthropogenisation, the area is still characterised by a considerable variety of freshwater habitats, possibly harbouring rich odonate communities, which, however, have been never thoroughly investigated. This study aimed to produce the first commented checklist of the Odonata of this region, accompanied by distribution maps.
    New information: The work is based on 12,093 records spanning from 1981 and 2022, derived from literature (289), revision of collections (42), citizen-science projects (1249) and unpublished data from the authors and their collaborators (10,513). Overall, fifty-five species occur - or occurred in the past - in the study area (20 Zygoptera and 35 Anisoptera). One species,
    Language English
    Publishing date 2023-11-07
    Publishing country Bulgaria
    Document type Journal Article
    ZDB-ID 2736709-5
    ISSN 1314-2828
    ISSN 1314-2828
    DOI 10.3897/BDJ.11.e111358
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: How aberrant N-glycosylation can alter protein functionality and ligand binding: An atomistic view.

    Castelli, Matteo / Yan, Pengrong / Rodina, Anna / Digwal, Chander S / Panchal, Palak / Chiosis, Gabriela / Moroni, Elisabetta / Colombo, Giorgio

    Structure (London, England : 1993)

    2023  Volume 31, Issue 8, Page(s) 987–1004.e8

    Abstract: ... we integrate computational and experimental tools to investigte how N-glycosylation of specific residues ... for the recognition of interacting proteins. N-glycosylation plays an active role in modulating the energy landscape ...

    Abstract Protein-assembly defects due to an enrichment of aberrant conformational protein variants are emerging as a new frontier in therapeutics design. Understanding the structural elements that rewire the conformational dynamics of proteins and pathologically perturb functionally oriented ensembles is important for inhibitor development. Chaperones are hub proteins for the assembly of multiprotein complexes and an enrichment of aberrant conformers can affect the cellular proteome, and in turn, phenotypes. Here, we integrate computational and experimental tools to investigte how N-glycosylation of specific residues in glucose-regulated protein 94 (GRP94) modulates internal dynamics and alters the conformational fitness of regions fundamental for the interaction with ATP and synthetic ligands and impacts substructures important for the recognition of interacting proteins. N-glycosylation plays an active role in modulating the energy landscape of GRP94, and we provide support for leveraging the knowledge on distinct glycosylation variants to design molecules targeting GRP94 disease-associated conformational states and assemblies.
    MeSH term(s) Glycosylation ; Ligands ; Molecular Chaperones/chemistry ; Protein Conformation ; Protein Binding
    Chemical Substances Ligands ; Molecular Chaperones
    Language English
    Publishing date 2023-06-20
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural
    ZDB-ID 1213087-4
    ISSN 1878-4186 ; 0969-2126
    ISSN (online) 1878-4186
    ISSN 0969-2126
    DOI 10.1016/j.str.2023.05.017
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Safety of lacto-N-tetraose (LNT) produced by derivative strains of

    Turck, Dominique / Bohn, Torsten / Castenmiller, Jacqueline / De Henauw, Stefaan / Hirsch-Ernst, Karen Ildico / Maciuk, Alexandre / Mangelsdorf, Inge / McArdle, Harry J / Naska, Androniki / Pelaez, Carmen / Pentieva, Kristina / Siani, Alfonso / Thies, Frank / Tsabouri, Sophia / Vinceti, Marco / Cubadda, Francesco / Frenzel, Thomas / Heinonen, Marina / Marchelli, Rosangela /
    Neuhäuser-Berthold, Monika / Poulsen, Morten / Prieto Maradona, Miguel / Schlatter, Josef Rudolf / van Loveren, Henk / Colombo, Paolo / Noriega Fernández, Estefanía / Knutsen, Helle Katrine

    EFSA journal. European Food Safety Authority

    2022  Volume 20, Issue 5, Page(s) e07242

    Abstract: ... Allergens (NDA) was asked to deliver an opinion on lacto-N-tetraose (LNT) as a novel food (NF) pursuant ... oligosaccharide (HiMO) LNT, but it also contains d-lactose, lacto-N-triose II and ...

    Abstract Following a request from the European Commission, the EFSA Panel on Nutrition, Novel Foods and Food Allergens (NDA) was asked to deliver an opinion on lacto-N-tetraose (LNT) as a novel food (NF) pursuant to Regulation (EU) 2015/2283. The NF is a powdered mixture mainly composed of the human-identical milk oligosaccharide (HiMO) LNT, but it also contains d-lactose, lacto-N-triose II and
    Language English
    Publishing date 2022-05-16
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2540248-1
    ISSN 1831-4732 ; 1831-4732
    ISSN (online) 1831-4732
    ISSN 1831-4732
    DOI 10.2903/j.efsa.2022.7242
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Effect of soil management on erosion in mountain vineyards (N-W Italy)

    Stanchi, S. / Zecca, O. / Hudek, C. / Pintaldi, E. / Viglietti, D. / D'Amico, M. E. / Colombo, N. / Goslino, D. / Letey, M. / Freppaz, M.

    Sustainability

    2021  Volume 13, Issue 4, Art. 1991, Page(s) 15 pp.

    Abstract: ... located in the inner part of Aosta Valley (N-W Italian Alps). The vineyard rows were equipped ... the erosion process. The collected sediments were highly enriched in organic C, total N, and fine size ...

    Institution Department of Agricultural, Forest and Food Sciences, University of Turin, 10095 Grugliasco, Italy
    Abstract We studied the effects of three soil management approaches (permanent grassing, chemical weeding, and buffer strips), and the additional impact of tractor passage on soil erosion in a sloping vineyard located in the inner part of Aosta Valley (N-W Italian Alps). The vineyard rows were equipped with a sediment collection system with channels and barrel tanks. A total of 12 events with sediment production were observed across 6 years, and the collected sediments were weighted and analyzed. Average erosion rates ranged from negligible (mainly in grassed rows) to 1.1 t/ha per event (after weeding). The most erosive event occurred in July 2015, with a total rainfall of 32.2 mm, of which 20.1 were recorded in 1 h. Despite the limited number of erosive events observed, and the low measured erosion rates, permanent grassing reduced soil erosion considerably with respect to weeding; buffering had a comparable effect to grassing. The tractor passage, independent of the soil management approaches adopted, visibly accelerated the erosion process. The collected sediments were highly enriched in organic C, total N, and fine size fractions, indicating a potential loss of fertility over time. Despite the measured erosion rates being low over the experiment’s duration, more severe events are well documented in the recent past, and the number of intense storms is likely to increase due to climate change. Thus, the potential effects of erosion in the medium and long term need to be limited to a minimum rate of soil loss. Our experiment helped to compare soil losses by erosion under different soil management practices, including permanent grassing, i.e., a nature-based erosion mitigation measure. The results of the research can provide useful indications for planners and practitioners in similar regions, for sustainable, cross-sectoral soil management, and the enhancement of soil ecosystem services.
    Language English
    Document type Article
    ZDB-ID 2518383-7
    ISSN 2071-1050
    ISSN 2071-1050
    Database Viticulture and Oenology Abstracts

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  7. Article ; Online: Atlantic salmon adapt to low dietary n-3 PUFA and warmer water temperatures by increasing feed intake and expression of n-3 biosynthesis-related transcripts

    Colombo, Stefanie M. / Budge, Suzanne M. / Hall, Jennifer R. / Kornicer, Jovana / White, Nolan

    Fish Physiol Biochem. 2023 Feb., v. 49, no. 1 p.39-60

    2023  

    Abstract: Climate change can have cascading impacts on biochemical reactions in aquatic ecosystems. Aquatic ectotherms can adapt to surrounding temperatures by using long-chain polyunsaturated fatty acids (LC-PUFAs) to maintain cell membrane fluidity. In a warming ...

    Abstract Climate change can have cascading impacts on biochemical reactions in aquatic ecosystems. Aquatic ectotherms can adapt to surrounding temperatures by using long-chain polyunsaturated fatty acids (LC-PUFAs) to maintain cell membrane fluidity. In a warming scenario, less LC-PUFA is needed to maintain fluidity. Our objective was to determine the impact of low dietary LC-PUFA and warm water temperature on growth, fatty acid (FA) storage, and expression of lipid metabolism–related transcripts in Atlantic salmon. Salmon (141 g) were fed two diets (high or low LC-PUFA) at either 12 °C or 16 °C for 16 weeks. Salmon weighed more and consumed more food at 16 °C and when fed the low-LC-PUFA diet. Liver and muscle FA mostly depended on diet rather than temperature. DHA in muscle was higher at 16 °C and in salmon fed the high-LC-PUFA diet. Levels of FA desaturation transcripts were more highly expressed at 16 °C and in salmon fed the low-LC-PUFA diet, which suggests synthesis of LC-PUFA. Overall, with slow, chronic temperature increases, salmon may adapt to low dietary LC-PUFA by synthesizing more when required.
    Keywords Salmo salar ; cell membranes ; climate change ; diet ; ectothermy ; feed intake ; liver ; membrane fluidity ; muscles ; omega-3 fatty acids ; salmon ; water temperature
    Language English
    Dates of publication 2023-02
    Size p. 39-60.
    Publishing place Springer Netherlands
    Document type Article ; Online
    ZDB-ID 292907-7
    ISSN 1573-5168 ; 0920-1742
    ISSN (online) 1573-5168
    ISSN 0920-1742
    DOI 10.1007/s10695-022-01157-2
    Database NAL-Catalogue (AGRICOLA)

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  8. Article ; Online: Selenoprotein N is an endoplasmic reticulum calcium sensor that links luminal calcium levels to a redox activity.

    Chernorudskiy, Alexander / Varone, Ersilia / Colombo, Sara Francesca / Fumagalli, Stefano / Cagnotto, Alfredo / Cattaneo, Angela / Briens, Mickael / Baltzinger, Mireille / Kuhn, Lauriane / Bachi, Angela / Berardi, Andrea / Salmona, Mario / Musco, Giovanna / Borgese, Nica / Lescure, Alain / Zito, Ester

    Proceedings of the National Academy of Sciences of the United States of America

    2020  Volume 117, Issue 35, Page(s) 21288–21298

    Abstract: ... Here we report that Selenoprotein N (SEPN1) is a type II transmembrane protein that senses ER calcium ...

    Abstract The endoplasmic reticulum (ER) is the reservoir for calcium in cells. Luminal calcium levels are determined by calcium-sensing proteins that trigger calcium dynamics in response to calcium fluctuations. Here we report that Selenoprotein N (SEPN1) is a type II transmembrane protein that senses ER calcium fluctuations by binding this ion through a luminal EF-hand domain. In vitro and in vivo experiments show that via this domain, SEPN1 responds to diminished luminal calcium levels, dynamically changing its oligomeric state and enhancing its redox-dependent interaction with cellular partners, including the ER calcium pump sarcoplasmic/endoplasmic reticulum calcium ATPase (SERCA). Importantly, single amino acid substitutions in the EF-hand domain of SEPN1 identified as clinical variations are shown to impair its calcium-binding and calcium-dependent structural changes, suggesting a key role of the EF-hand domain in SEPN1 function. In conclusion, SEPN1 is a ER calcium sensor that responds to luminal calcium depletion, changing its oligomeric state and acting as a reductase to refill ER calcium stores.
    MeSH term(s) Calcium/metabolism ; Endoplasmic Reticulum/metabolism ; HeLa Cells ; Humans ; Intracellular Calcium-Sensing Proteins/genetics ; Intracellular Calcium-Sensing Proteins/metabolism ; Muscle Proteins/genetics ; Muscle Proteins/metabolism ; Oxidation-Reduction ; Selenoproteins/genetics ; Selenoproteins/metabolism
    Chemical Substances Intracellular Calcium-Sensing Proteins ; Muscle Proteins ; SELENON protein, human ; Selenoproteins ; Calcium (SY7Q814VUP)
    Language English
    Publishing date 2020-08-17
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.2003847117
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Safety of lacto-N-fucopentaose I/2'-fucosyllactose (LNFP-I/2'-FL) mixture as a novel food pursuant to Regulation (EU) 2015/2283.

    Turck, Dominique / Bohn, Torsten / Castenmiller, Jacqueline / De Henauw, Stefaan / Hirsch-Ernst, Karen Ildico / Maciuk, Alexandre / Mangelsdorf, Inge / McArdle, Harry J / Naska, Androniki / Pentieva, Kristina / Siani, Alfonso / Thies, Frank / Tsabouri, Sophia / Vinceti, Marco / Aguilera-Gómez, Margarita / Cubadda, Francesco / Frenzel, Thomas / Heinonen, Marina / Prieto Maradona, Miguel /
    Marchelli, Rosangela / Neuhäuser-Berthold, Monika / Peláez, Carmen / Poulsen, Morten / Schlatter, Josef Rudolf / Siskos, Alexandros / van Loveren, Henk / Colombo, Paolo / Noriega Fernández, Estefanía / Knutsen, Helle Katrine

    EFSA journal. European Food Safety Authority

    2023  Volume 21, Issue 12, Page(s) e8412

    Abstract: ... Allergens (NDA) was asked to deliver an opinion on lacto-N-fucopentaose I (LNFP-I)/2'-fucosyllactose (2'-FL ... identical milk oligosaccharides (HiMO) LNFP-I and 2'-FL, but it also contains d-lactose, lacto-N-tetraose ...

    Abstract Following a request from the European Commission, the EFSA Panel on Nutrition, Novel Foods and Food Allergens (NDA) was asked to deliver an opinion on lacto-N-fucopentaose I (LNFP-I)/2'-fucosyllactose (2'-FL) mixture as a novel food (NF) pursuant to Regulation (EU) 2015/2283. The NF is mainly composed of the human-identical milk oligosaccharides (HiMO) LNFP-I and 2'-FL, but it also contains d-lactose, lacto-N-tetraose, difucosyllactose, 3-fucosyllactose, LNFP-I fructose isomer, 2'-fucosyl-d-lactulose, l-fucose and 2'-fucosyl-d-lactitol, and a small fraction of other related saccharides. The NF is produced by fermentation by a genetically modified strain (
    Language English
    Publishing date 2023-12-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2540248-1
    ISSN 1831-4732 ; 1831-4732
    ISSN (online) 1831-4732
    ISSN 1831-4732
    DOI 10.2903/j.efsa.2023.8412
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: N-Glycan Profile and Kidney Disease in Type 1 Diabetes.

    Bermingham, Mairead L / Colombo, Marco / McGurnaghan, Stuart J / Blackbourn, Luke A K / Vučković, Frano / Pučić Baković, Maja / Trbojević-Akmačić, Irena / Lauc, Gordan / Agakov, Felix / Agakova, Anna S / Hayward, Caroline / Klarić, Lucija / Palmer, Colin N A / Petrie, John R / Chalmers, John / Collier, Andrew / Green, Fiona / Lindsay, Robert S / Macrury, Sandra /
    McKnight, John A / Patrick, Alan W / Thekkepat, Sandeep / Gornik, Olga / McKeigue, Paul M / Colhoun, Helen M

    Diabetes care

    2017  Volume 41, Issue 1, Page(s) 79–87

    Abstract: Objective: Poorer glycemic control in type 1 diabetes may alter N-glycosylation patterns ... We investigated associations between N-glycans and glycemic control and renal function in type 1 diabetes ... and IgG-specific N-glycan profiles. This yielded a relative abundance of 39 total (GP) and 24 IgG (IGP ...

    Abstract Objective: Poorer glycemic control in type 1 diabetes may alter N-glycosylation patterns on circulating glycoproteins, and these alterations may be linked with diabetic kidney disease (DKD). We investigated associations between N-glycans and glycemic control and renal function in type 1 diabetes.
    Research design and methods: Using serum samples from 818 adults who were considered to have extreme annual loss in estimated glomerular filtration rate (eGFR; i.e., slope) based on retrospective clinical records, from among 6,127 adults in the Scottish Diabetes Research Network Type 1 Bioresource Study, we measured total and IgG-specific N-glycan profiles. This yielded a relative abundance of 39 total (GP) and 24 IgG (IGP) N-glycans. Linear regression models were used to investigate associations between N-glycan structures and HbA
    Results: Higher HbA
    Conclusions: Higher HbA
    MeSH term(s) Adult ; Blood Glucose/metabolism ; Cross-Sectional Studies ; Diabetes Mellitus, Type 1/blood ; Diabetes Mellitus, Type 1/complications ; Diabetic Nephropathies/blood ; Diabetic Nephropathies/complications ; Female ; Glomerular Filtration Rate ; Glycated Hemoglobin/metabolism ; Glycoproteins/blood ; Glycosylation ; Humans ; Hyperglycemia/blood ; Hyperglycemia/complications ; Immunoglobulin G/blood ; Male ; Middle Aged ; Polysaccharides/blood ; Retrospective Studies ; Sample Size ; Scotland
    Chemical Substances Blood Glucose ; Glycated Hemoglobin A ; Glycoproteins ; Immunoglobulin G ; Polysaccharides
    Language English
    Publishing date 2017-11-16
    Publishing country United States
    Document type Journal Article
    ZDB-ID 441231-x
    ISSN 1935-5548 ; 0149-5992
    ISSN (online) 1935-5548
    ISSN 0149-5992
    DOI 10.2337/dc17-1042
    Database MEDical Literature Analysis and Retrieval System OnLINE

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