Author

Sofie Keijzer

Amsterdam UMC Location University of Amsterdam

Listed by name: these papers carry no ORCID for this author, so different people with the same name may be mixed together.

Biology Disciplines

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Immunology· 1

Signature Assays, Organisms & Methods

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Research Focus:cell type annotation· 1 Research Focus:differential expression· 1 Approach:experimental assay· 1 Organism:human· 1 Assay:proteomics· 1

Frequent Co-Authors

Gerard J. van Mierlo· 1 shared Gestur VidarssoniD· 1 shared Jim B. D. KeijseriD· 1 shared Marij Streutker· 1 shared Nienke OskamiD· 1 shared Ninotska I. L. DerkseniD· 1 shared Pleuni Ooijevaar‐de HeeriD· 1 shared T2B! immunity against SARS‐CoV‐2 study group· 1 shared

Activity by Year

2026-2026 · peak 1/yr

Co-Author Collaboration Network

9 top collaborators · 36 mutual co-author links

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1 shared paperImmunology

Gerard J. van Mierlo

Mutual co-authors in cluster

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1 paper

Recent·Most cited

Assessment of polymeric immunoglobulin A and M via detection of the joining chain

Nienke Oskam, Jim B. D. Keijser, Marij Streutker, Sofie Keijzer, Pleuni Ooijevaar‐de Heer, Gerard J. van Mierlo, Ninotska I. L. Derksen, T2B! immunity against SARS‐CoV‐2 study group, Gestur Vidarsson, Theo Rispens

This paper develops sensitive ELISAs to quantify J-chain-containing IgA and IgM, revealing that 10% of circulating IgA is polymeric and enabling high-throughput analysis of polymeric IgA responses.

bioRxiv · Jul 16, 2026 · PreprintImmunology