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In this study, a method, based on dual column affinity chromatography hyphenated to isotope dilution inductively coupled plasma–quadrupole MS, was developed for selenium determination in selenoprotein P, glutathione peroxidase, and selenoalbumin in human serum samples from a group of healthy volunteers (n=399). Method improvement was achieved using methanol‐enhanced isotope dilution which resulted...
The p14/MP1 scaffold complex binds MEK1 and ERK1/2 on late endosomes, thus regulating the strength, duration and intracellular location of MAPK signaling. By organelle proteomics we have compared the protein composition of endosomes purified from genetically modified p14−/−, p14+/− and p14rev mouse embryonic fibroblasts. The latter ones were reconstituted retrovirally from p14−/− mouse embryonic fibroblasts...
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