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Liquid‐phase based separation systems for depletion, prefractionation, and enrichment of proteins in biological fluids and matrices for in‐depth proteomics analysis—An update covering the period 2014–2016

This review article is an update of our previous one by C. Puangpila, E. Mayadunne, and Z. El Rassi, Electrophoresis 2015, 36, 238–252. Similarly to the previous article, this review has two main topics, including (i) proteomic sample preparation (e.g., depletion of high‐abundance proteins, reduction of the protein dynamic concentration range, and enrichment of a particular subproteome), and (ii) the subsequent chromatographic and/or electrophoretic prefractionation prior to protein separation and identification by LC–MS/MS. More than 70 papers published in the period extending from mid‐2014 to the present have been reviewed. Although an effort was made to yield a comprehensive review article, one may safely state that this review article is by no means thorough, and the aim was to rather provide a concise description of the latest developments in the field.