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To address immunocapture of proteins in large cohorts of clinical samples high throughput sample processing is required. Here a method using the proteomic sample platform, ISET (integrated selective enrichment target) that integrates highly specific immunoaffinity capture of protein biomarker, digestion and sample cleanup with a direct interface to mass spectrometry is presented. The robustness of the on-ISET protein digestion protocol was validated by MALDI MS analysis of model proteins, ranging from 40. fmol to 1. pmol per nanovial. On-ISET digestion and MALDI MS/MS analysis of immunoaffinity captured disease-associated biomarker PSA (prostate specific antigen) from human seminal plasma are presented. © 2013 Elsevier B.V.

Original publication

DOI

10.1016/j.aca.2013.08.051

Type

Journal article

Journal

Analytica Chimica Acta

Publication Date

07/01/2014

Volume

807

Pages

1 - 8