Abstract
Proteins usually do not function as monomers but rather perform their functions by interacting with themselves or other proteins. Co-immunoprecipitation is an essential assay for detecting protein interactions in vivo. In this chapter, we describe how to use co-immunoprecipitation to detect protein interactions in Arabidopsis protoplasts, seedlings, and Nicotiana benthamiana leaves. When using co-immunoprecipitation assays to detect protein interactions, it is necessary to pay attention to the design of the experimental and control groups.
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