Abstract
The UV RESISTANCE LOCUS 8 (UVR8) is a photoreceptor mediating photomorphogenic responses to UV-B. UVR8 exists as homodimer in plants and UV-B induces dissociation of dimeric UVR8 into monomers to initiate responses. The monomer/dimer status of UVR8 is reversible and a dynamic photo-equilibrium is established in plants according to the ambient light conditions. Here we describe a method to detect UVR8 homodimer and monomer by immunoblotting method from tomato (Solanum lycopersicum) plants. The feature of this method is that protein samples are not boiled prior to loading on an SDS-PAGE gel, which allows the detection of UVR8 homodimer and monomers simultaneously with a single antibody.
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