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Record W2122219747 · doi:10.1002/9780470054581.eib349

Protein Glycosylation: Methods for Determination

2009· other· en· W2122219747 on OpenAlexaff
Michael Butler, Hélène Perreault

Bibliographic record

VenueEncyclopedia of Industrial Biotechnology · 2009
Typeother
Languageen
FieldBiochemistry, Genetics and Molecular Biology
TopicGlycosylation and Glycoproteins Research
Canadian institutionsUniversity of Manitoba
Fundersnot available
KeywordsGlycanGlycosylationGlycoproteinExoglycosidaseBiopharmaceuticalComputational biologyChemistryBioprocessMass spectrometryCapillary electrophoresisComputer scienceChromatographyBiochemistryBiologyBiotechnology

Abstract

fetched live from OpenAlex

Abstract Glycoproteins are produced in eukaryotes as pools of different glycoforms with varying glycan structures attached to a single invariant peptide backbone. The characteristic glycoform profile is dependent upon the glycan structures added during co‐translation and modified post‐translationally. The glycosylation process is important to ensure the full efficacy of any glycoproteins used therapeutically. As the number of therapeutic increases there is a requirement to apply rapid analysis of glycans to glycoproteins that are produced as biopharmaceuticals for human therapy. Such methods are required as quality control to ensure that there is minimal variability between multiple batches in a bioprocess. Similarly, protocols adopted for diagnostic screening need to be rapid in order to handle multiple samples. Full structural analysis is possible by a combination of techniques including NMR, mass spectrometry and HPLC using exoglycosidase arrays for sequential breakdown of glycan structures. However there are other techniques that allow rapid screening that do not necessarily include full structural analysis. High though‐ put techniques are available for mass spectrometry, HPLC as well as lectin arrays, FACE or capillary electrophoresis Rapid analysis using such techniques may provide profiles that are adequate at least for ensuring consistency in production. The choice of method therefore will depend upon the degree of analytical information required. Several of the methods described in this chapter may be acceptable as providing glycan profiles but may not provide unambiguous structural assignments. The analysis of glycosylation patters are important to ensure consistency during a biopharmaceutical production process. Here we present the basis for analysis by several techniques that might be suitable during bioprocessing.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.002
metaresearch head score (Gemma)0.001
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Not applicable · Consensus signal: none
GenreCandidate signal: Methods · Consensus signal: Methods
Teacher disagreement score0.011
Threshold uncertainty score0.037

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0020.001
Meta-epidemiology (narrow)0.0020.001
Meta-epidemiology (broad)0.0010.001
Bibliometrics0.0040.004
Science and technology studies0.0010.001
Scholarly communication0.0010.002
Open science0.0020.002
Research integrity0.0010.003
Insufficient payload (model declined to judge)0.0110.021

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.026
GPT teacher head0.341
Teacher spread0.316 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designNot applicable
Domainnot available
GenreMethods

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations0
Published2009
Admission routes1
Has abstractyes

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