Abstract
The wheat germ cell-free protein synthesis system has a significant advantage for high-throughput production of eukaryotic multidomain proteins in a folded state. In this chapter, we describe two kinds of methods for performing autophosphorylation assay of plant receptor kinases (PRKs) by using the wheat cell-free system. One is an in vitro kinase assay performed using biotin-streptavidin affinity purification technology, and the other is a luminescence-based high-throughput assay for autophosphorylation analysis. We anticipate that our cell-free-based methods might facilitate the characterization of plant PRKs.
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