The unexplainable plasma protein measurements from Proximity Extension Assays
Gräf, J. F.; Kurgan, N.; Rasmussen, S.
Show abstract
Plasma proteomics assays aim to capture biologically interpretable circulating protein signals. Here we systematically assess Olink Explore targets with exceptionally low variance explainability by integrating genetic associations, cross-platform concordance and tissue and peptide atlases. We identify a subset of protein targets likely lacking robust plasma signals, highlighting assay- and tissue-specific limitations with implications for panel design, statistical power and interpretation of large-scale proteomics studies.
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