Reference: Di Girolamo F, et al. (2013) Reproducibility of combinatorial peptide ligand libraries for proteome capture evaluated by selected reaction monitoring. J Proteomics 89:215-26

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Abstract

CONCLUSIONS: Combinatorial hexapeptide ligand libraries (CPLLs) bound to solid matrices have been proposed to specifically capture and detect low-abundance proteins in complex samples. To assess whether the CPLL capture can be confidently applied in systems biology studies involving the precise quantitation of proteins across a broad range of abundances and a multitude of samples, we evaluated its reproducibility and performance features. Using selected reaction monitoring assays for proteins covering the whole range of abundances we show that the technique is reproducible and compatible with quantitative proteomic studies. However, the protein-to-bead ratio affects the enrichment of specific proteins and CPLLs depleted specific sets of proteins from a whole proteome extract. Our results suggest that CPLL-based analyses should be coupled to the analysis of untreated samples, to maximize proteome coverage. Overall, our data confirms the applicability of CPLLs in systems biology research and guides the correct use of this technique. Copyright ? 2013 Elsevier B.V. All rights reserved.

Reference Type
Journal Article
Authors
Di Girolamo F, Righetti PG, Soste M, Feng Y, Picotti P
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