Journal
JOURNAL OF PROTEOME RESEARCH
Volume 4, Issue 6, Pages 2404-2411Publisher
AMER CHEMICAL SOC
DOI: 10.1021/pr050208p
Keywords
proteomics; mass spectrometry; tissue; formaldehyde; paraffin; fixative; histochemistry; temporal bone
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Formalin-fixed and paraffin-embedded (FFPE) tissues present a particular challenge for proteomic analysis. Yet, most of the archived tissues in hospitals and tissue banks worldwide are only available in this form. We have developed conditions for removal of the embedding medium and protein digestion, such that informative tryptic peptides are released from fixed proteins which are suitable for analysis by liquid chromatography-mass spectrometry (LC-MS). We demonstrate that the peptide identifications made by this approach compare favorably to those made from matched fresh frozen tissue. Moreover, we demonstrate that a high level of sequence coverage can be observed for proteins of interest.
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