Common fixation-permeabilization methods cause artifactual localization of a type II transmembrane protein

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Abstract

We found that a localization artifact can arise from common immunofluorescence methods. Specifically, cell fixation and permeabilization can cause mislocalization of a type II membrane-bound protein, ER mannosidase I, from its native localization in vesicles to the Golgi complex. Live cell microscopy and interestingly also mild cell fixation with paraformaldehyde without membrane permeabilization do not present this artifact.

Original languageEnglish
Pages (from-to)517-521
Number of pages5
JournalMicroscopy (Oxford, England)
Volume65
Issue number6
DOIs
StatePublished - 1 Dec 2016

Keywords

  • Golgi
  • fixation
  • mannosidase
  • permeabilization
  • transmembrane protein
  • vesicles

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