Blue Native Polyacrylamide Gel Electrophoresis (BN-PAGE) for the Analysis of Protein Oligomers in Plants

Curr Protoc Plant Biol. 2020 Jun;5(2):e20107. doi: 10.1002/cppb.20107.


Protein-protein interactions, including oligomerization, are involved in regulation of many cellular processes. Unfortunately, many proteins are expressed at a very low level in vivo, making it challenging to observe oligomerization by size-exclusion chromatography, also known as gel filtration. In this protocol, we present detailed steps to perform blue native polyacrylamide gel electrophoresis (BN-PAGE), a method to study protein oligomers in plants. The article describes protein sample preparation from transgenic Arabidopsis thaliana and running a BN-PAGE gel followed by direct western blotting or, alternatively, two-dimensional sodium dodecyl sulfide-polyacrylamide gel electrophoresis (2D SDS-PAGE). This protocol will be helpful for new researchers conducting related experiments to analyze stable protein interactions including homo- or hetero-oligomerization in plants. © 2020 The Authors.

Keywords: Arabidopsis thaliana; BN-PAGE; SDS-PAGE; protein oligomers; western blotting.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Blotting, Western
  • Electrophoresis, Gel, Two-Dimensional
  • Electrophoresis, Polyacrylamide Gel
  • Membrane Proteins*
  • Native Polyacrylamide Gel Electrophoresis


  • Membrane Proteins